C# BigInteger class. BigInteger.cs is a csharp program. It is the BIgInteger class. It has methods: abs() , FermatLittleTest(int confidence) ,gcd(BigInteger bi) , genCoPrime(int bits, Random rand) , genPseudoPrime(int bits, int confidence, Random rand) , genRandomBits(int bits, Random rand) , isProbablePrime(int confidence) , isProbablePrime() , Jacobi(BigInteger a, BigInteger b) , LucasSequence(BigInteger P, BigInteger Q, BigInteger k, BigInteger n) ,max(BigInteger bi) , min(BigInteger bi) , modInverse(BigInteger modulus) , RabinMillerTest(int confidence) ,
标签： BigInteger class BIgInteger program
上传时间： 2013-12-23
上传用户：ynzfm
The task of clustering Web sessions is to group Web sessions based on similarity and consists of maximizing the intra- group similarity while minimizing the inter-group similarity． The first and foremost question needed to be considered in clustering W b sessions is how to measure the similarity between Web sessions．However．there are many shortcomings in traditiona1 measurements．This paper introduces a new method for measuring similarities between Web pages that takes into account not only the URL but also the viewing time of the visited web page．Yhen we give a new method to measure the similarity of Web sessions using sequence alignment and the similarity of W eb page access in detail Experiments have proved that our method is valid and e币cient．
标签： sessions clustering similarity Web
上传时间： 2014-01-11
上传用户：songrui
Instead of finding the longest common subsequence, let us try to determine the length of the LCS. Then tracking back to find the LCS. Consider a1a2…am and b1b2…bn. Case 1: am=bn. The LCS must contain am, we have to find the LCS of a1a2…am-1 and b1b2…bn-1. Case 2: am≠bn. Wehave to find the LCS of a1a2…am-1 and b1b2…bn, and a1a2…am and b b b b1b2…bn-1 Let A = a1 a2 … am and B = b1 b2 … bn Let Li j denote the length of the longest i,g g common subsequence of a1 a2 … ai and b1 b2 … bj. Li,j = Li-1,j-1 + 1 if ai=bj max{ L L } a≠b i-1,j, i,j-1 if ai≠j L0,0 = L0,j = Li,0 = 0 for 1≤i≤m, 1≤j≤n.
标签： the subsequence determine Instead
上传时间： 2013-12-17
上传用户：evil
This routine calls the glpk library to solve a LP/MIP problem. A typical LP problem has following structure: [min|max] C x s.t. Ax ["="|"<="|">="] b {x <= UB} {x >= LB} The calling syntax is: [XMIN,FMIN,STATUS,EXTRA]=glpkmex(SENSE,C,A,B,CTYPE,LB,UB,... VARTYPE,PARAM,LPSOLVER,SAVE)
标签： problem following routine library
上传时间： 2014-12-01
上传用户：changeboy
/* ********************************************************************************************************* * uC/TCP-IP V2 * The Embedded TCP/IP Suite * * (c) Copyright 2003-2010; Micrium, Inc.; Weston, FL * * All rights reserved. Protected by international copyright laws. * * uC/TCP-IP is provided in source form to registered licensees ONLY. It is * illegal to distribute this source code to any third party unless you receive * written permission by an authorized Micrium representative. Knowledge of * the source code may NOT be used to develop a similar product. * * Please help us continue to provide the Embedded community with the finest * software available. Your honesty is greatly appreciated. * * You can contact us at www.micrium.com. ********************************************************************************************************* */ /* ********************************************************************************************************* * * NETWORK TCP LAYER * (TRANSMISSION CONTROL PROTOCOL) * * Filename : net_tcp.h * Version : V2.10 * Programmer(s) : ITJ ********************************************************************************************************* * Note(s) : (1) Supports Transmission Control Protocol as described in RFC #793 with the following * restrictions/constraints : * * (a) TCP Security & Precedence NOT supported RFC # 793, Section 3.6 * * (b) TCP Urgent Data NOT supported RFC # 793, Section 3.7 * 'The Communication of * Urgent Information' * * (c) The following TCP options NOT supported : * * (1) Window Scale RFC #1072, Section 2 * RFC #1323, Section 2 * (2) Selective Acknowledgement (SACK) RFC #1072, Section 3 * RFC #2018 * RFC #2883 * (3) TCP Echo RFC #1072, Section 4 * (4) Timestamp RFC #1323, Section 3.2 * (5) Protection Against Wrapped Sequences (PAWS) RFC #1323, Section 4 * * (d) #### IP-Options-to-TCP-Connection RFC #1122, Section 4.2.3.8 * Handling NOT supported * * (e) #### ICMP-Error-Message-to-TCP-Connection RFC #1122, Section 4.2.3.9 * Handling NOT currently supported * * (2) TCP Layer assumes/requires Network Socket Layer (see 'net_sock.h MODULE Note #1a2'). ********************************************************************************************************* */ /*$PAGE*/ /* ********************************************************************************************************* * MODULE * * Note(s) : (1) TCP Layer module is NOT required for UDP-to-Application API configuration. * * See also 'net_cfg.h TRANSPORT LAYER CONFIGURATION' * & 'net_cfg.h USER DATAGRAM PROTOCOL LAYER CONFIGURATION'. * * See also 'net_tcp.h Note #2'. * * (2) The following TCP-module-present configuration value MUST be pre-#define'd in * 'net_cfg_net.h' PRIOR to all other network modules that require TCP Layer * configuration (see 'net_cfg_net.h TCP LAYER CONFIGURATION Note #2b') : * * NET_TCP_MODULE_PRESENT ********************************************************************************************************* */ #ifdef NET_TCP_MODULE_PRESENT /* See Note #2. */ /* ********************************************************************************************************* * EXTERNS ********************************************************************************************************* */ #if ((defined(NET_TCP_MODULE)) && \ (defined(NET_GLOBALS_EXT))) #define NET_TCP_EXT #else #define NET_TCP_EXT extern #endif /*$PAGE*/ /* ********************************************************************************************************* * DEFINES ********************************************************************************************************* */ /* ********************************************************************************************************* * TCP HEADER DEFINES * * Note(s) : (1) The following TCP value MUST be pre-#define'd in 'net_def.h' PRIOR to 'net_buf.h' so that * the Network Buffer Module can configure maximum buffer header size (see 'net_def.h TCP * LAYER DEFINES' & 'net_buf.h NETWORK BUFFER INDEX & SIZE DEFINES Note #1') : * * (a) NET_TCP_HDR_SIZE_MAX 60 (NET_TCP_HDR_LEN_MAX * * NET_TCP_HDR_LEN_WORD_SIZE) * * (2) Urgent pointer & data NOT supported (see 'net_tcp.h Note #1b'). ********************************************************************************************************* */ #define NET_TCP_HDR_LEN_MASK 0xF000u #define NET_TCP_HDR_LEN_SHIFT 12u #define NET_TCP_HDR_LEN_NONE 0u #define NET_TCP_HDR_LEN_MIN 5u #define NET_TCP_HDR_LEN_MAX 15u #define NET_TCP_HDR_LEN_WORD_SIZE CPU_WORD_SIZE_32 #define NET_TCP_HDR_SIZE_MIN (NET_TCP_HDR_LEN_MIN * NET_TCP_HDR_LEN_WORD_SIZE) #if 0 /* See Note #1a. */ #define NET_TCP_HDR_SIZE_MAX (NET_TCP_HDR_LEN_MAX * NET_TCP_HDR_LEN_WORD_SIZE) #endif #define NET_TCP_HDR_SIZE_TOT_MIN (NET_IP_HDR_SIZE_TOT_MIN + NET_TCP_HDR_SIZE_MIN) #define NET_TCP_HDR_SIZE_TOT_MAX (NET_IP_HDR_SIZE_TOT_MAX + NET_TCP_HDR_SIZE_MAX) #define NET_TCP_PSEUDO_HDR_SIZE 12u /* = sizeof(NET_TCP_PSEUDO_HDR) */ #define NET_TCP_PORT_NBR_RESERVED NET_PORT_NBR_RESERVED #define NET_TCP_PORT_NBR_NONE NET_TCP_PORT_NBR_RESERVED #define NET_TCP_HDR_URG_PTR_NONE 0x0000u /* See Note #2. */ /*$PAGE*/ /* ********************************************************************************************************* * TCP HEADER FLAG DEFINES * * Note(s) : (1) See 'TCP HEADER Note #2' for flag fields. * * (2) Urgent pointer & data NOT supported (see 'net_tcp.h Note #1b'). ********************************************************************************************************* */ #define NET_TCP_HDR_FLAG_MASK 0x0FFFu #define NET_TCP_HDR_FLAG_NONE DEF_BIT_NONE #define NET_TCP_HDR_FLAG_RESERVED 0x0FE0u /* MUST be '0'. */ #define NET_TCP_HDR_FLAG_URGENT DEF_BIT_05 /* See Note #2. */ #define NET_TCP_HDR_FLAG_ACK DEF_BIT_04 #define NET_TCP_HDR_FLAG_PUSH DEF_BIT_03 #define NET_TCP_HDR_FLAG_RESET DEF_BIT_02 #define NET_TCP_HDR_FLAG_SYNC DEF_BIT_01 #define NET_TCP_HDR_FLAG_FIN DEF_BIT_00 #define NET_TCP_HDR_FLAG_CLOSE NET_TCP_HDR_FLAG_FIN /* ********************************************************************************************************* * TCP FLAG DEFINES ********************************************************************************************************* */ /* ------------------ NET TCP FLAGS ------------------- */ #define NET_TCP_FLAG_NONE DEF_BIT_NONE #define NET_TCP_FLAG_USED DEF_BIT_00 /* TCP conn cur used; i.e. NOT in free TCP conn pool. */ /* ------------------ TCP TX FLAGS ------------------- */ /* TCP tx flags copied from TCP hdr flags. */ #define NET_TCP_FLAG_TX_FIN NET_TCP_HDR_FLAG_FIN #define NET_TCP_FLAG_TX_CLOSE NET_TCP_FLAG_TX_FIN #define NET_TCP_FLAG_TX_SYNC NET_TCP_HDR_FLAG_SYNC #define NET_TCP_FLAG_TX_RESET NET_TCP_HDR_FLAG_RESET #define NET_TCP_FLAG_TX_PUSH NET_TCP_HDR_FLAG_PUSH #define NET_TCP_FLAG_TX_ACK NET_TCP_HDR_FLAG_ACK #define NET_TCP_FLAG_TX_URGENT NET_TCP_HDR_FLAG_URGENT #define NET_TCP_FLAG_TX_BLOCK DEF_BIT_07 /* ------------------ TCP RX FLAGS ------------------- */ #define NET_TCP_FLAG_RX_DATA_PEEK DEF_BIT_08 #define NET_TCP_FLAG_RX_BLOCK DEF_BIT_15 /*$PAGE*/ /* ********************************************************************************************************* * TCP TYPE DEFINES * * Note(s) : (1) NET_TCP_TYPE_&&& #define values specifically chosen as ASCII representations of the TCP * types. Memory displays of TCP types will display with their chosen ASCII names. ********************************************************************************************************* */ /* ------------------ NET TCP TYPES ------------------- */ #if (CPU_CFG_ENDIAN_TYPE == CPU_ENDIAN_TYPE_BIG) #define NET_TCP_TYPE_NONE 0x4E4F4E45u /* "NONE" in ASCII. */ #define NET_TCP_TYPE_CONN 0x54435020u /* "TCP " in ASCII. */ #else #if (CPU_CFG_DATA_SIZE == CPU_WORD_SIZE_32) #define NET_TCP_TYPE_NONE 0x454E4F4Eu /* "NONE" in ASCII. */ #define NET_TCP_TYPE_CONN 0x20504354u /* "TCP " in ASCII. */ #elif (CPU_CFG_DATA_SIZE == CPU_WORD_SIZE_16) #define NET_TCP_TYPE_NONE 0x4F4E454Eu /* "NONE" in ASCII. */ #define NET_TCP_TYPE_CONN 0x43542050u /* "TCP " in ASCII. */ #else /* Dflt CPU_WORD_SIZE_08. */ #define NET_TCP_TYPE_NONE 0x4E4F4E45u /* "NONE" in ASCII. */ #define NET_TCP_TYPE_CONN 0x54435020u /* "TCP " in ASCII. */ #endif #endif /* ********************************************************************************************************* * TCP SEQUENCE NUMBER DEFINES * * Note(s) : (1) TCP initial transmit sequence number is incremented by a fixed value, preferably a large * prime value or a large value with multiple unique factors. * * (a) One reasonable TCP initial transmit sequence number increment value example : * * 65527 = 37 * 23 * 11 * 7 * * * #### NET_TCP_TX_SEQ_NBR_CTR_INC could be developer-configured in 'net_cfg.h'. * * See also 'NET_TCP_TX_GET_SEQ_NBR() Notes #1b2 & #1c2'. ********************************************************************************************************* */ #define NET_TCP_SEQ_NBR_NONE 0u #define NET_TCP_ACK_NBR_NONE NET_TCP_SEQ_NBR_NONE #define NET_TCP_TX_SEQ_NBR_CTR_INC 65527u /* See Note #1. */ #define NET_TCP_ACK_NBR_DUP_WIN_SIZE_SCALE 4 /*$PAGE*/ /* ********************************************************************************************************* * TCP DATA/TOTAL LENGTH DEFINES * * Note(s) : (1) (a) TCP total length #define's (NET_TCP_TOT_LEN) relate to the total size of a complete * TCP packet, including the packet's TCP header. Note that a complete TCP packet MAY * be fragmented in multiple Internet Protocol packets. * * (b) TCP data length #define's (NET_TCP_DATA_LEN) relate to the data size of a complete * TCP packet, equal to the total TCP packet length minus its TCP header size. Note * that a complete TCP packet MAY be fragmented in multiple Internet Protocol packets. ********************************************************************************************************* */ /* See Notes #1a & #1b. */ #define NET_TCP_DATA_LEN_MIN 0u #define NET_TCP_TOT_LEN_MIN (NET_TCP_HDR_SIZE_MIN + NET_TCP_DATA_LEN_MIN) #define NET_TCP_TOT_LEN_MAX (NET_IP_TOT_LEN_MAX - NET_IP_HDR_SIZE_MIN ) #define NET_TCP_DATA_LEN_MAX (NET_TCP_TOT_LEN_MAX - NET_TCP_HDR_SIZE_MIN) /*$PAGE*/ /* ********************************************************************************************************* * TCP SEGMENT SIZE DEFINES * * Note(s) : (1) (a) RFC # 879, Section 3 states that the TCP Maximum Segment Size "counts only * data octets in the segment, ... not the TCP header or the IP header". * * (b) RFC #1122, Section 4.2.2.6 requires that : * * (1) "The MSS value to be sent in an MSS option must be less than or equal to * * (A) MMS_R - 20 * * where MMS_R is the maximum size for a transport-layer message that can * be received." * * (2) "If an MSS option is not received at connection setup, TCP MUST assume a * default send MSS of 536 (576 - 40)." * * See also 'net_ip.h IP DATA/TOTAL LENGTH DEFINES Note #1'. ********************************************************************************************************* */ /* See Note #1. */ #define NET_TCP_MAX_SEG_SIZE_DFLT (NET_IP_MAX_DATAGRAM_SIZE_DFLT - NET_IP_HDR_SIZE_MIN - NET_TCP_HDR_SIZE_MIN) #define NET_TCP_MAX_SEG_SIZE_DFLT_RX NET_TCP_DATA_LEN_MAX /* See Note #1b1. */ #define NET_TCP_MAX_SEG_SIZE_DFLT_TX NET_TCP_MAX_SEG_SIZE_DFLT /* See Note #1b2. */ #define NET_TCP_MAX_SEG_SIZE_NONE 0u #define NET_TCP_MAX_SEG_SIZE_MIN NET_TCP_MAX_SEG_SIZE_DFLT #define NET_TCP_MAX_SEG_SIZE_MAX NET_TCP_DATA_LEN_MAX #define NET_TCP_SEG_LEN_MIN NET_TCP_DATA_LEN_MIN #define NET_TCP_SEG_LEN_MAX NET_TCP_DATA_LEN_MAX #define NET_TCP_SEG_LEN_SYNC 1u #define NET_TCP_SEG_LEN_FIN 1u #define NET_TCP_SEG_LEN_CLOSE NET_TCP_SEG_LEN_FIN #define NET_TCP_SEG_LEN_ACK 0u #define NET_TCP_SEG_LEN_RESET 0u #define NET_TCP_SEG_LEN_PROBE 0u #define NET_TCP_DATA_LEN_TX_SYNC 0u #define NET_TCP_DATA_LEN_TX_FIN 0u #define NET_TCP_DATA_LEN_TX_CLOSE NET_TCP_DATA_LEN_TX_FIN #define NET_TCP_DATA_LEN_TX_ACK 0u #define NET_TCP_DATA_LEN_TX_PROBE_NO_DATA 0u #define NET_TCP_DATA_LEN_TX_PROBE_DATA 1u #define NET_TCP_DATA_LEN_TX_RESET 0u #define NET_TCP_TX_PROBE_DATA 0x00u /* ********************************************************************************************************* * TCP WINDOW SIZE DEFINES * * Note(s) : (1) Although NO RFC specifies the absolute minimum TCP connection window size value allowed, * RFC #793, Section 3.7 'Data Communication : Managing the Window' states that for "the * window ... there is an assumption that this is related to the currently available data * buffer space available for this connection". ********************************************************************************************************* */ #define NET_TCP_WIN_SIZE_NONE 0u #define NET_TCP_WIN_SIZE_MIN NET_TCP_MAX_SEG_SIZE_MIN #define NET_TCP_WIN_SIZE_MAX DEF_INT_16U_MAX_VAL /*$PAGE*/ /* ********************************************************************************************************* * TCP HEADER OPTIONS DEFINES * * Note(s) : (1) See the following RFC's for TCP options summary : * * (a) RFC # 793, Section 3.1 'Header Format : Options' * (b) RFC #1122; Sections 4.2.2.5, 4.2.2.6 * * (2) TCP option types are encoded in the first octet for each TCP option as follows : * * -------- * | TYPE | * -------- * * The TCP option type value determines the TCP option format : * * (a) The following TCP option types are single-octet TCP options -- i.e. the option type * octet is the ONLY octet for the TCP option. * * (1) TYPE = 0 End of Options List * (2) TYPE = 1 No Operation * * * (b) All other TCP options MUST be multi-octet TCP options (see RFC #1122, Section 4.2.2.5) : * * ------------------------------ * | TYPE | LEN | TCP OPT | * ------------------------------ * * where * TYPE Indicates the specific TCP option type * LEN Indicates the total TCP option length, in octets, including * the option type & the option length octets * TCP OPT Additional TCP option octets, if any, that contain the remaining * TCP option information * * The following TCP option types are multi-octet TCP options where the option's second * octet specify the total TCP option length, in octets, including the option type & the * option length octets : * * (1) TYPE = 2 Maximum Segment Size See RFC # 793, Section 3.1 'Header Format : * Options : Maximum Segment Size'; * RFC #1122, Section 4.2.2.6; * RFC # 879, Section 3 * * (2) TYPE = 3 Window Scale See 'net_tcp.h Note #1c1' * (3) TYPE = 4 SACK Allowed See 'net_tcp.h Note #1c2' * (4) TYPE = 5 SACK Option See 'net_tcp.h Note #1c2' * (5) TYPE = 6 Echo Request See 'net_tcp.h Note #1c3' * (6) TYPE = 7 Echo Reply See 'net_tcp.h Note #1c3' * (7) TYPE = 8 Timestamp See 'net_tcp.h Note #1c4' * * (3) TCP header allows for a maximum option list length of 40 octets : * * NET_TCP_HDR_OPT_SIZE_MAX = NET_TCP_HDR_SIZE_MAX - NET_TCP_HDR_SIZE_MIN * * = 60 - 20 * * = 40 * * (4) 'NET_TCP_OPT_SIZE' MUST be pre-defined PRIOR to all definitions that require TCP option * size data type. ********************************************************************************************************* */ /*$PAGE*/ #define NET_TCP_HDR_OPT_END_LIST 0u #define NET_TCP_HDR_OPT_NOP 1u #define NET_TCP_HDR_OPT_MAX_SEG_SIZE 2u #define NET_TCP_HDR_OPT_WIN_SCALE 3u #define NET_TCP_HDR_OPT_SACK_PERMIT 4u #define NET_TCP_HDR_OPT_SACK 5u #define NET_TCP_HDR_OPT_ECHO_REQ 6u #define NET_TCP_HDR_OPT_ECHO_REPLY 7u #define NET_TCP_HDR_OPT_TS 8u #define NET_TCP_HDR_OPT_PAD NET_TCP_HDR_OPT_END_LIST #define NET_TCP_HDR_OPT_LEN_END_LIST 1u #define NET_TCP_HDR_OPT_LEN_NOP 1u #define NET_TCP_HDR_OPT_LEN_MAX_SEG_SIZE 4u #define NET_TCP_HDR_OPT_LEN_WIN_SCALE 3u #define NET_TCP_HDR_OPT_LEN_SACK_PERMIT 2u #define NET_TCP_HDR_OPT_LEN_ECHO_REQ 6u #define NET_TCP_HDR_OPT_LEN_ECHO_REPLY 6u #define NET_TCP_HDR_OPT_LEN_TS 10u #define NET_TCP_HDR_OPT_LEN_SACK_MIN 6u #define NET_TCP_HDR_OPT_LEN_SACK_MAX 38u #define NET_TCP_HDR_OPT_LEN_MIN 1u #define NET_TCP_HDR_OPT_LEN_MIN_LEN 2u #define NET_TCP_HDR_OPT_LEN_MAX 38u typedef CPU_INT32U NET_TCP_OPT_SIZE; /* TCP opt size data type (see Note #4). */ #define NET_TCP_HDR_OPT_SIZE_WORD (sizeof(NET_TCP_OPT_SIZE)) #define NET_TCP_HDR_OPT_SIZE_MAX (NET_TCP_HDR_SIZE_MAX - NET_TCP_HDR_SIZE_MIN) #define NET_TCP_HDR_OPT_NBR_MIN 0u #define NET_TCP_HDR_OPT_NBR_MAX (NET_TCP_HDR_OPT_SIZE_MAX / NET_TCP_HDR_OPT_SIZE_WORD) #define NET_TCP_HDR_OPT_IX NET_TCP_HDR_SIZE_MIN /*$PAGE*/ /* ********************************************************************************************************* * TCP OPTION CONFIGURATION TYPE DEFINES * * Note(s) : (1) NET_TCP_OPT_CFG_TYPE_&&& #define values specifically chosen as ASCII representations of * the TCP option configuration types. Memory displays of TCP option configuration buffers * will display the TCP option configuration TYPEs with their chosen ASCII names. ********************************************************************************************************* */ /* ---------------- TCP OPT CFG TYPES ----------------- */ #if (CPU_CFG_ENDIAN_TYPE == CPU_ENDIAN_TYPE_BIG) #define NET_TCP_OPT_CFG_TYPE_NONE 0x4E4F4E45u /* "NONE" in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_MAX_SEG_SIZE 0x4D535320u /* "MSS " in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_WIN_SCALE 0x57494E20u /* "WIN " in ASCII (see 'net_tcp.h Note #1c1'). */ #define NET_TCP_OPT_CFG_TYPE_SACK_PERMIT 0x53434B50u /* "SCKP" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_SACK 0x5341434Bu /* "SACK" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REQ 0x45524551u /* "EREQ" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REPLY 0x4543484Fu /* "ECHO" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_TS 0x54532020u /* "TS " in ASCII (see 'net_tcp.h Note #1c4'). */ #else #if (CPU_CFG_DATA_SIZE == CPU_WORD_SIZE_32) #define NET_TCP_OPT_CFG_TYPE_NONE 0x454E4F4Eu /* "NONE" in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_MAX_SEG_SIZE 0x2053534Du /* "MSS " in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_WIN_SCALE 0x204E4957u /* "WIN " in ASCII (see 'net_tcp.h Note #1c1'). */ #define NET_TCP_OPT_CFG_TYPE_SACK_PERMIT 0x504B4353u /* "SCKP" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_SACK 0x4B434153u /* "SACK" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REQ 0x51455245u /* "EREQ" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REPLY 0x4F484345u /* "ECHO" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_TS 0x20205354u /* "TS " in ASCII (see 'net_tcp.h Note #1c4'). */ #elif (CPU_CFG_DATA_SIZE == CPU_WORD_SIZE_16) #define NET_TCP_OPT_CFG_TYPE_NONE 0x4F4E454Eu /* "NONE" in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_MAX_SEG_SIZE 0x534D2053u /* "MSS " in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_WIN_SCALE 0x4957204Eu /* "WIN " in ASCII (see 'net_tcp.h Note #1c1'). */ #define NET_TCP_OPT_CFG_TYPE_SACK_PERMIT 0x4353504Bu /* "SCKP" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_SACK 0x41534B43u /* "SACK" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REQ 0x52455145u /* "EREQ" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REPLY 0x43454F48u /* "ECHO" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_TS 0x53542020u /* "TS " in ASCII (see 'net_tcp.h Note #1c4'). */ #else /* Dflt CPU_WORD_SIZE_08. */ #define NET_TCP_OPT_CFG_TYPE_NONE 0x4E4F4E45u /* "NONE" in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_MAX_SEG_SIZE 0x4D535320u /* "MSS " in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_WIN_SCALE 0x57494E20u /* "WIN " in ASCII (see 'net_tcp.h Note #1c1'). */ #define NET_TCP_OPT_CFG_TYPE_SACK_PERMIT 0x53434B50u /* "SCKP" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_SACK 0x5341434Bu /* "SACK" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REQ 0x45524551u /* "EREQ" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REPLY 0x4543484Fu /* "ECHO" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_TS 0x54532020u /* "TS " in ASCII (see 'net_tcp.h Note #1c4'). */ #endif #endif /*$PAGE*/ /* ********************************************************************************************************* * TCP CONNECTION TIMEOUT DEFINES * * Note(s) : (1) (a) (1) RFC #1122, Section 4.2.2.13 'DISCUSSION' states that "the graceful close algorithm * of TCP requires that the connection state remain defined on (at least) one end of * the connection, for a timeout period of 2xMSL ... During this period, the (remote * socket, local socket) pair that defines the connection is busy and cannot be reused". * * (2) The following sections reiterate that the TIME-WAIT state timeout scalar is two * maximum segment lifetimes (2 MSL) : * * (A) RFC #793, Section 3.9 'Event Processing : SEGMENT ARRIVES : * Check Sequence Number : TIME-WAIT STATE' * (B) RFC #793, Section 3.9 'Event Processing : SEGMENT ARRIVES : * Check FIN Bit : TIME-WAIT STATE' * * (b) (1) RFC #793, Section 3.3 'Sequence Numbers : Knowing When to Keep Quiet' states that * "the Maximum Segment Lifetime (MSL) is ... to be 2 minutes. This is an engineering * choice, and may be changed if experience indicates it is desirable to do so". * * (2) Microsoft Corporation's Windows XP defaults MSL to 15 seconds. ********************************************************************************************************* */ /* Max seg timeout (see Note #1b) : */ #define NET_TCP_CONN_TIMEOUT_MAX_SEG_MIN_SEC ( 0u ) /* ... min = 0 seconds */ #define NET_TCP_CONN_TIMEOUT_MAX_SEG_MAX_SEC ( 2u * DEF_TIME_NBR_SEC_PER_MIN) /* ... max = 2 minutes */ #define NET_TCP_CONN_TIMEOUT_MAX_SEG_DFLT_SEC ( 15u ) /* ... dflt = 15 seconds */ #define NET_TCP_CONN_TIMEOUT_MAX_SEG_SCALAR 2u /* ... scalar (see Note #1a). */ #define NET_TCP_CONN_TIMEOUT_CONN_DFLT_SEC (120u * DEF_TIME_NBR_SEC_PER_MIN) /* Dflt conn timeout = 120 minutes */ #define NET_TCP_CONN_TIMEOUT_USER_DFLT_SEC ( 30u * DEF_TIME_NBR_SEC_PER_MIN) /* Dflt user timeout = 30 minutes */ /*$PAGE*/ /* ********************************************************************************************************* * TCP CONNECTION STATES * * Note(s) : (1) See the following RFC's for TCP state machine summary : * * (a) RFC # 793; Sections 3.2, 3.4, 3.5, 3.9 * (b) RFC #1122; Sections 4.2.2.8, 4.2.2.10, 4.2.2.11, 4.2.2.13, 4.2.2.18, 4.2.2.20 * * (2) (a) #### Additional closing-data-available state used for closing connections to allow the * application layer to receive any remaining data. * * See also 'net_tcp.c NetTCP_RxPktConnHandlerFinWait1() Note #2f5A2', * 'net_tcp.c NetTCP_RxPktConnHandlerFinWait2() Note #2f5B', * 'net_tcp.c NetTCP_RxPktConnHandlerClosing() Note #2d2B2a1B', * & 'net_tcp.c NetTCP_RxPktConnHandlerLastAck() Note #2d2A1b'. ********************************************************************************************************* */ #define NET_TCP_CONN_STATE_NONE 0u #define NET_TCP_CONN_STATE_FREE 1u #define NET_TCP_CONN_STATE_CLOSED 10u #define NET_TCP_CONN_STATE_LISTEN 20u #define NET_TCP_CONN_STATE_SYNC_RXD 30u #define NET_TCP_CONN_STATE_SYNC_RXD_PASSIVE 31u #define NET_TCP_CONN_STATE_SYNC_RXD_ACTIVE 32u #define NET_TCP_CONN_STATE_SYNC_TXD 35u #define NET_TCP_CONN_STATE_CONN 40u #define NET_TCP_CONN_STATE_FIN_WAIT_1 50u #define NET_TCP_CONN_STATE_FIN_WAIT_2 51u #define NET_TCP_CONN_STATE_CLOSING 52u #define NET_TCP_CONN_STATE_TIME_WAIT 53u #define NET_TCP_CONN_STATE_CLOSE_WAIT 55u #define NET_TCP_CONN_STATE_LAST_ACK 56u #define NET_TCP_CONN_STATE_CLOSING_DATA_AVAIL 59u /* See Note #2a. */ /* ********************************************************************************************************* * TCP CONNECTION QUEUE STATES ********************************************************************************************************* */ #define NET_TCP_RX_Q_STATE_NONE 0u #define NET_TCP_RX_Q_STATE_CLOSED 100u #define NET_TCP_RX_Q_STATE_CLOSING 101u #define NET_TCP_RX_Q_STATE_SYNC 110u #define NET_TCP_RX_Q_STATE_CONN 111u #define NET_TCP_TX_Q_STATE_NONE 0u #define NET_TCP_TX_Q_STATE_CLOSED 200u #define NET_TCP_TX_Q_STATE_CLOSING 201u #define NET_TCP_TX_Q_STATE_SYNC 210u #define NET_TCP_TX_Q_STATE_CONN 211u #define NET_TCP_TX_Q_STATE_SUSPEND 215u #define NET_TCP_TX_Q_STATE_CLOSED_SUSPEND 220u #define NET_TCP_TX_Q_STATE_CLOSING_SUSPEND 221u /*$PAGE*/ /* ********************************************************************************************************* * TCP CONNECTION CODE DEFINES **************
上传时间： 2015-11-22
上传用户：the same kong
批处理感知器算法的代码matlab w1=[1,0.1,1.1;1,6.8,7.1;1,-3.5,-4.1;1,2.0,2.7;1,4.1,2.8;1,3.1,5.0;1,-0.8,-1.3; 1,0.9,1.2;1,5.0,6.4;1,3.9,4.0]; w2=[1,7.1,4.2;1,-1.4,-4.3;1,4.5,0.0;1,6.3,1.6;1,4.2,1.9;1,1.4,-3.2;1,2.4,-4.0; 1,2.5,-6.1;1,8.4,3.7;1,4.1,-2.2]; w3=[1,-3.0,-2.9;1,0.5,8.7;1,2.9,2.1;1,-0.1,5.2;1,-4.0,2.2;1,-1.3,3.7;1,-3.4,6.2; 1,-4.1,3.4;1,-5.1,1.6;1,1.9,5.1]; figure; plot(w3(:,2),w3(:,3),'ro'); hold on; plot(w2(:,2),w2(:,3),'b+'); W=[w2;-w3];%增广样本规范化 a=[0,0,0]; k=0;%记录步数 n=1; y=zeros(size(W,2),1);%记录错分的样本 while any(y<=0) k=k+1; y=a*transpose(W);%记录错分的样本 a=a+sum(W(find(y<=0),:));%更新a if k >= 250 break end end if k<250 disp(['a为：',num2str(a)]) disp(['k为：',num2str(k)]) else disp(['在250步以内没有收敛，终止']) end %判决面：x2=-a2*x1/a3-a1/a3 xmin=min(min(w1(:,2)),min(w2(:,2))); xmax=max(max(w1(:,2)),max(w2(:,2))); x=xmin-1:xmax+1;%(xmax-xmin): y=-a(2)*x/a(3)-a(1)/a(3); plot(x,y)
上传时间： 2016-11-07
上传用户：a1241314660
#include<stdio.h> #include<string.h> #include<stdlib.h> #define N 100 int iNumOfStu=0; struct score { float math; float english; float computer; }; struct student { int number; char name[20]; struct score sco; float average; }; struct student stu[N]; void print_menu(void);//输出菜单 void choosemenu(void);//菜单选择 void input_student1(int);//输入学生信息 void input_student2(void);//输入总函数 void input_student3(int &,int);//判断学号是否重复 void input_student4(int,int);//覆盖原信息 void sort_student3(student s[],int);//按照英语成绩排序 void sort_student4(student s[],int);//按照计算机成绩排序 void sort_student2(student s[],int);//按照数学成绩排序 void sort_student5(student s[],int);//按照平均成绩排序 float input_score2(int);//计算学生平均成绩 void print_student2(void);//显示表头 void print_student3(int);//显示学生信息 void print_student1(int);//显示全部学生资料 void sort_student1(void);//排序总函数 void menu(void);//菜单调度总函数 int search_student2(int);//按学号查询学生信息并输出 void search_student3(int);//按平均分最高查询并输出 void search_student1(void);//查询总函数 void delete_student2(int,int);//删除学生信息 void delete_student1(void);//删除总函数 void change_student2(int);//修改学生资料 void change_student1(void);//修改总函数 void input_score3(int);//统计成绩 void input_score1(void);//统计成绩总函数 void print_help(void);//输出帮助信息 void exit_student(void);//退出系统 void save_student(student *,int);//保存学生信息 void main() { menu(); } void save_student(student *s,int a)//保存学生信息 { FILE *fp; if((fp=fopen("d:\\学生信息.txt","wb"))==NULL) { printf("不能打开文件！\n"); } else { printf("保存信息到D盘\n"); fprintf(fp,"本班所有学生具体信息如下：\r\n"); fprintf(fp," 学号 姓名 数学成绩 英语成绩 计算机成绩 平均成绩\r\n"); for(int i=0;i<a;i++) { fprintf(fp,"%8d%12s%14.2f%14.2f%14.2f%14.2f\n",stu[i].number,stu[i].name,stu[i].sco.math,stu[i].sco.english,stu[i].sco.computer,stu[i].average); fprintf(fp,"\r\n"); } fclose(fp); printf("信息保存成功！\n"); } } void exit_student(void)//退出系统 { exit(1); } void print_help(void)//输出帮助信息 { printf("本系统所能容纳的最大学生数为%d人\n学生信息保存在D盘根目录下，保存文件为“学生信息.txt”。\n感谢使用！\n",N); } void input_score1(void)//统计成绩总函数 { int c; c=search_student2(iNumOfStu); printf("学号：%d\n",stu[c].number); printf("姓名：%s\n",stu[c].name); input_score3(c); printf("新成绩录入成功！\n"); stu[c].average=input_score2(c); } void input_score3(int a)//统计成绩 { printf("数学新成绩："); scanf("%f",&stu[a].sco.math); printf("英语新成绩："); scanf("%f",&stu[a].sco.english); printf("计算机新成绩："); scanf("%f",&stu[a].sco.computer); } void change_student2(int a)//修改学生资料 { printf("学号：%d----修改为：",stu[a].number); scanf("%d",&stu[a].number); getchar(); printf("姓名：%s----修改为：",stu[a].name); gets(stu[a].name); printf("数学成绩：%.2f----修改为：",stu[a].sco.math); scanf("%f",&stu[a].sco.math); printf("英语成绩：%.2f----修改为：",stu[a].sco.english); scanf("%f",&stu[a].sco.english); printf("计算机成绩：%.2f----修改为：",stu[a].sco.computer); scanf("%f",&stu[a].sco.computer); } void change_student1(void)//修改总函数 { int c; c=search_student2(iNumOfStu); getchar(); printf("是否要修改此学生信息？（“y”代表是）"); char d; scanf("%c",&d); if(d=='y'||d=='Y') { change_student2(c); stu[c].average=input_score2(c); printf("信息修改成功！\n"); } } void delete_student1(void)//删除总函数 { int c; c=search_student2(iNumOfStu); getchar(); printf("是否删除此条记录？（“y”代表是）"); char d; scanf("%c",&d); if(d=='y'||d=='Y') { delete_student2(c,iNumOfStu); printf("记录已删除！\n"); } } void delete_student2(int a,int b)//删除学生信息 { for(int i=a;i<b-1;i++) { stu[i]=stu[i+1]; } --iNumOfStu; } void search_student1(void)//查询总函数 { printf("1、按学号查询\n2、按平均分最高查询\n请选择："); int c; scanf("%d",&c); switch(c) { case 1: { search_student2(iNumOfStu); break; } case 2: { search_student3(iNumOfStu); break; } default: break; } } void menu(void)//菜单调度总函数 { print_menu(); choosemenu(); } void sort_student1(void)//排序总函数 { printf("1、按数学成绩排序\n2、按英语成绩排序\n3、按计算机成绩排序\n4、按平均成绩排序\n请选择："); int c; scanf("%d",&c); switch(c) { case 1: { sort_student2(stu,iNumOfStu); break; } case 2: { sort_student3(stu,iNumOfStu); break; } case 3: { sort_student4(stu,iNumOfStu); break; } case 4: { sort_student5(stu,iNumOfStu); break; } default: break; } } void print_student1(int a)//显示全部学生资料 { printf("本班所有学生具体信息如下\n"); print_student2(); for(int i=0;i<a;i++) { print_student3(i); } } void print_student3(int a)//显示学生信息 { printf("%8d%12s%14.2f%14.2f%14.2f%14.2f\n",stu[a].number,stu[a].name,stu[a].sco.math,stu[a].sco.english,stu[a].sco.computer,stu[a].average); } void print_student2(void)//显示表头 { printf(" 学号 姓名 数学成绩 英语成绩 计算机成绩 平均成绩\n"); } void input_student4(int a,int b)//覆盖原信息 { stu[a]=stu[b-1]; --iNumOfStu; } void input_student3(int &a,int b)//判断学号是否重复 { if(a!=0) { int i=0; do { if(stu[a].number==stu[i].number) { printf("此学号代表的学生已录入\n1、覆盖原信息\n2、重新输入\n请选择："); int c; scanf("%d",&c); switch(c) { case 1: { input_student4(i,iNumOfStu); a=iNumOfStu-1; printf("信息已替换！\n"); break; } case 2: { printf("请重新输入学生信息：\n"); input_student1(iNumOfStu-1); break; } default: break; } break; } ++i; } while(i<b-1); } } void print_menu(void)//输出菜单 { printf("======欢迎来到学生信息管理系统======\n"); printf(" 1、输入学生资料\n"); printf(" 2、删除学生资料\n"); printf(" 3、查询学生资料\n"); printf(" 4、修改学生资料\n"); printf(" 5、显示学生资料\n"); printf(" 6、统计学生成绩\n"); printf(" 7、排序学生成绩\n"); printf(" 8、保存学生资料\n"); printf(" 9、获取帮助信息\n"); printf(" 10、退出系统\n"); printf("====================================\n"); printf("请选择："); } void input_student2(void)//输入总函数 { char end; printf("请输入学生信息（在最后一个学生信息录入完成后以“/”结束录入）：\n"); for(int i=0;(end=getchar())!='/';i++) { input_student1(i); ++iNumOfStu; input_student3(i,iNumOfStu); } for(int j=0;j<iNumOfStu;j++) { stu[j].average=input_score2(j); } } void input_student1(int a)//输入学生信息 { printf("学号："); scanf("%d",&stu[a].number); getchar(); printf("姓名："); gets(stu[a].name); printf("数学成绩："); scanf("%f",&stu[a].sco.math); printf("英语成绩："); scanf("%f",&stu[a].sco.english); printf("计算机成绩："); scanf("%f",&stu[a].sco.computer); } float input_score2(int a)//计算学生平均成绩 { return (stu[a].sco.math+stu[a].sco.english+stu[a].sco.computer)/3; } void search_student3(int a)//按平均分最高查询并输出 { int max=0; for(int i=0;i<a;i++) { if(stu[max].average<stu[i].average) { max=i; } } print_student2(); print_student3(max); } void sort_student2(student s[],int a)//按照数学成绩排序 { struct student temp; for(int i=0;i<a-1;i++) { int max=i; for(int j=i+1;j<a;j++) if(stu[j].sco.math>stu[max].sco.math) { max=j; } if(max!=i) { temp=stu[max]; stu[max]=stu[i]; stu[i]=temp; } } print_student2(); for(int k=0;k<a;k++) { print_student3(k); } } void sort_student3(student s[],int a)//按照英语成绩排序 { struct student temp; for(int i=0;i<a-1;i++) { int max=i; for(int j=i+1;j<a;j++) if(stu[j].sco.english>stu[max].sco.english) { max=j; } if(max!=i) { temp=stu[max]; stu[max]=stu[i]; stu[i]=temp; } } print_student2(); for(int k=0;k<a;k++) { print_student3(k); } } void sort_student4(student s[],int a)//按照计算机成绩排序 { struct student temp; for(int i=0;i<a-1;i++) { int max=i; for(int j=i+1;j<a;j++) if(stu[j].sco.computer>stu[max].sco.computer) { max=j; } if(max!=i) { temp=stu[max]; stu[max]=stu[i]; stu[i]=temp; } } print_student2(); for(int k=0;k<a;k++) { print_student3(k); } } void sort_student5(student s[],int a)//按照平均成绩排序 { struct student temp; for(int i=0;i<a-1;i++) { int max=i; for(int j=i+1;j<a;j++) if(stu[j].average>stu[max].average) { max=j; } if(max!=i) { temp=stu[max]; stu[max]=stu[i]; stu[i]=temp; } } print_student2(); for(int k=0;k<a;k++) { print_student3(k); } } int search_student2(int a)//按照学号查找学生并输出 { int num; int c; printf("请输入要查询的学号："); scanf("%d",&num); for(int i=0;i<a;i++) { if(num==stu[i].number) { c=i; } } printf("此学生的信息是：\n"); print_student2(); print_student3(c); return c; } void choosemenu(void)//菜单选择 { int i; scanf("%d",&i); switch(i) { case 1: { input_student2(); printf("按回车键返回主菜单"); getchar(); getchar(); menu(); break; } case 2: { delete_student1(); printf("按回车键返回主菜单"); getchar(); getchar(); menu(); break; } case 3: { search_student1(); printf("按回车键返回主菜单"); getchar(); getchar(); menu(); break; } case 4: { change_student1(); printf("按回车键返回主菜单"); getchar(); getchar(); menu(); break; } case 5: { print_student1(iNumOfStu); printf("按回车键返回主菜单"); getchar(); getchar(); menu(); break; } case 6: { input_score1(); printf("按回车键返回主菜单"); getchar(); getchar(); menu(); break; } case 7: { sort_student1(); printf("按回车键返回主菜单"); getchar(); getchar(); menu(); break; } case 8: { save_student(stu,iNumOfStu); printf("按回车键返回主菜单"); getchar(); getchar(); menu(); break; } case 9: { print_help(); printf("按回车键返回主菜单"); getchar(); getchar(); menu(); break; } case 10: { exit_student(); } default: break; } } 运行结果： 源文件下载地址： http://115.com/file/clnq138g#一个简单的学生成绩管理系统.rar （请将此地址复制到浏览器地址栏中访问下载页面）
标签： 成绩查询系统
上传时间： 2019-06-08
上传用户：啊的撒旦
#include<stdio.h> #include<string.h> #include<stdlib.h> #define N 100 int iNumOfStu=0; struct score { float math; float english; float computer; }; struct student { int number; char name[20]; struct score sco; float average; }; struct student stu[N]; void print_menu(void);//输出菜单 void choosemenu(void);//菜单选择 void input_student1(int);//输入学生信息 void input_student2(void);//输入总函数 void input_student3(int &,int);//判断学号是否重复 void input_student4(int,int);//覆盖原信息 void sort_student3(student s[],int);//按照英语成绩排序 void sort_student4(student s[],int);//按照计算机成绩排序 void sort_student2(student s[],int);//按照数学成绩排序 void sort_student5(student s[],int);//按照平均成绩排序 float input_score2(int);//计算学生平均成绩 void print_student2(void);//显示表头 void print_student3(int);//显示学生信息 void print_student1(int);//显示全部学生资料 void sort_student1(void);//排序总函数 void menu(void);//菜单调度总函数 int search_student2(int);//按学号查询学生信息并输出 void search_student3(int);//按平均分最高查询并输出 void search_student1(void);//查询总函数 void delete_student2(int,int);//删除学生信息 void delete_student1(void);//删除总函数 void change_student2(int);//修改学生资料 void change_student1(void);//修改总函数 void input_score3(int);//统计成绩 void input_score1(void);//统计成绩总函数 void print_help(void);//输出帮助信息 void exit_student(void);//退出系统 void save_student(student *,int);//保存学生信息 void main() { menu(); } void save_student(student *s,int a)//保存学生信息 { FILE *fp; if((fp=fopen("d:\\学生信息.txt","wb"))==NULL) { printf("不能打开文件！\n"); } else { printf("保存信息到D盘\n"); fprintf(fp,"本班所有学生具体信息如下：\r\n"); fprintf(fp," 学号 姓名 数学成绩 英语成绩 计算机成绩 平均成绩\r\n"); for(int i=0;i<a;i++) { fprintf(fp,"%8d%12s%14.2f%14.2f%14.2f%14.2f\n",stu[i].number,stu[i].name,stu[i].sco.math,stu[i].sco.english,stu[i].sco.computer,stu[i].average); fprintf(fp,"\r\n"); } fclose(fp); printf("信息保存成功！\n"); } } void exit_student(void)//退出系统 { exit(1); } void print_help(void)//输出帮助信息 { printf("本系统所能容纳的最大学生数为%d人\n学生信息保存在D盘根目录下，保存文件为“学生信息.txt”。\n感谢使用！\n",N); } void input_score1(void)//统计成绩总函数 { int c; c=search_student2(iNumOfStu); printf("学号：%d\n",stu[c].number); printf("姓名：%s\n",stu[c].name); input_score3(c); printf("新成绩录入成功！\n"); stu[c].average=input_score2(c); } void input_score3(int a)//统计成绩 { printf("数学新成绩："); scanf("%f",&stu[a].sco.math); printf("英语新成绩："); scanf("%f",&stu[a].sco.english); printf("计算机新成绩："); scanf("%f",&stu[a].sco.computer); } void change_student2(int a)//修改学生资料 { printf("学号：%d----修改为：",stu[a].number); scanf("%d",&stu[a].number); getchar(); printf("姓名：%s----修改为：",stu[a].name); gets(stu[a].name); printf("数学成绩：%.2f----修改为：",stu[a].sco.math); scanf("%f",&stu[a].sco.math); printf("英语成绩：%.2f----修改为：",stu[a].sco.english); scanf("%f",&stu[a].sco.english); printf("计算机成绩：%.2f----修改为：",stu[a].sco.computer); scanf("%f",&stu[a].sco.computer); } void change_student1(void)//修改总函数 { int c; c=search_student2(iNumOfStu); getchar(); printf("是否要修改此学生信息？（“y”代表是）"); char d; scanf("%c",&d); if(d=='y'||d=='Y') { change_student2(c); stu[c].average=input_score2(c); printf("信息修改成功！\n"); } } void delete_student1(void)//删除总函数 { int c; c=search_student2(iNumOfStu); getchar(); printf("是否删除此条记录？（“y”代表是）"); char d; scanf("%c",&d); if(d=='y'||d=='Y') { delete_student2(c,iNumOfStu); printf("记录已删除！\n"); } } void delete_student2(int a,int b)//删除学生信息 { for(int i=a;i<b-1;i++) { stu[i]=stu[i+1]; } --iNumOfStu; } void search_student1(void)//查询总函数 { printf("1、按学号查询\n2、按平均分最高查询\n请选择："); int c; scanf("%d",&c); switch(c) { case 1: { search_student2(iNumOfStu); break; } case 2: { search_student3(iNumOfStu); break; } default: break; } } void menu(void)//菜单调度总函数 { print_menu(); choosemenu(); } void sort_student1(void)//排序总函数 { printf("1、按数学成绩排序\n2、按英语成绩排序\n3、按计算机成绩排序\n4、按平均成绩排序\n请选择："); int c; scanf("%d",&c); switch(c) { case 1: { sort_student2(stu,iNumOfStu); break; } case 2: { sort_student3(stu,iNumOfStu); break; } case 3: { sort_student4(stu,iNumOfStu); break; } case 4: { sort_student5(stu,iNumOfStu); break; } default: break; } } void print_student1(int a)//显示全部学生资料 { printf("本班所有学生具体信息如下\n"); print_student2(); for(int i=0;i<a;i++) { print_student3(i); } } void print_student3(int a)//显示学生信息 { printf("%8d%12s%14.2f%14.2f%14.2f%14.2f\n",stu[a].number,stu[a].name,stu[a].sco.math,stu[a].sco.english,stu[a].sco.computer,stu[a].average); } void print_student2(void)//显示表头 { printf(" 学号 姓名 数学成绩 英语成绩 计算机成绩 平均成绩\n"); } void input_student4(int a,int b)//覆盖原信息 { stu[a]=stu[b-1]; --iNumOfStu; } void input_student3(int &a,int b)//判断学号是否重复 { if(a!=0) { int i=0; do { if(stu[a].number==stu[i].number) { printf("此学号代表的学生已录入\n1、覆盖原信息\n2、重新输入\n请选择："); int c; scanf("%d",&c); switch(c) { case 1: { input_student4(i,iNumOfStu); a=iNumOfStu-1; printf("信息已替换！\n"); break; } case 2: { printf("请重新输入学生信息：\n"); input_student1(iNumOfStu-1); break; } default: break; } break; } ++i; } while(i<b-1); } } void print_menu(void)//输出菜单 { printf("======欢迎来到学生信息管理系统======\n"); printf(" 1、输入学生资料\n"); printf(" 2、删除学生资料\n"); printf(" 3、查询学生资料\n"); printf(" 4、修改学生资料\n"); printf(" 5、显示学生资料\n"); printf(" 6、统计学生成绩\n"); printf(" 7、排序学生成绩\n"); printf(" 8、保存学生资料\n"); printf(" 9、获取帮助信息\n"); printf(" 10、退出系统\n"); printf("====================================\n"); printf("请选择："); } void input_student2(void)//输入总函数 { char end; printf("请输入学生信息（在最后一个学生信息录入完成后以“/”结束录入）：\n"); for(int i=0;(end=getchar())!='/';i++) { input_student1(i); ++iNumOfStu; input_student3(i,iNumOfStu); } for(int j=0;j<iNumOfStu;j++) { stu[j].average=input_score2(j); } } void input_student1(int a)//输入学生信息 { printf("学号："); scanf("%d",&stu[a].number); getchar(); printf("姓名："); gets(stu[a].name); printf("数学成绩："); scanf("%f",&stu[a].sco.math); printf("英语成绩："); scanf("%f",&stu[a].sco.english); printf("计算机成绩："); scanf("%f",&stu[a].sco.computer); } float input_score2(int a)//计算学生平均成绩 { return (stu[a].sco.math+stu[a].sco.english+stu[a].sco.computer)/3; } void search_student3(int a)//按平均分最高查询并输出 { int max=0; for(int i=0;i<a;i++) { if(stu[max].average<stu[i].average) { max=i; } } print_student2(); print_student3(max); } void sort_student2(student s[],int a)//按照数学成绩排序 { struct student temp; for(int i=0;i<a-1;i++) { int max=i; for(int j=i+1;j<a;j++) if(stu[j].sco.math>stu[max].sco.math) { max=j; } if(max!=i) { temp=stu[max]; stu[max]=stu[i]; stu[i]=temp; } } print_student2(); for(int k=0;k<a;k++) { print_student3(k); } } void sort_student3(student s[],int a)//按照英语成绩排序 { struct student temp; for(int i=0;i<a-1;i++) { int max=i; for(int j=i+1;j<a;j++) if(stu[j].sco.english>stu[max].sco.english) { max=j; } if(max!=i) { temp=stu[max]; stu[max]=stu[i]; stu[i]=temp; } } print_student2(); for(int k=0;k<a;k++) { print_student3(k); } } void sort_student4(student s[],int a)//按照计算机成绩排序 { struct student temp; for(int i=0;i<a-1;i++) { int max=i; for(int j=i+1;j<a;j++) if(stu[j].sco.computer>stu[max].sco.computer) { max=j; } if(max!=i) { temp=stu[max]; stu[max]=stu[i]; stu[i]=temp; } } print_student2(); for(int k=0;k<a;k++) { print_student3(k); } } void sort_student5(student s[],int a)//按照平均成绩排序 { struct student temp; for(int i=0;i<a-1;i++) { int max=i; for(int j=i+1;j<a;j++) if(stu[j].average>stu[max].average) { max=j; } if(max!=i) { temp=stu[max]; stu[max]=stu[i]; stu[i]=temp; } } print_student2(); for(int k=0;k<a;k++) { print_student3(k); } } int search_student2(int a)//按照学号查找学生并输出 { int num; int c; printf("请输入要查询的学号："); scanf("%d",&num); for(int i=0;i<a;i++) { if(num==stu[i].number) { c=i; } } printf("此学生的信息是：\n"); print_student2(); print_student3(c); return c; } void choosemenu(void)//菜单选择 { int i; scanf("%d",&i); switch(i) { case 1: { input_student2(); printf("按回车键返回主菜单"); getchar(); getchar(); menu(); break; } case 2: { delete_student1(); printf("按回车键返回主菜单"); getchar(); getchar(); menu(); break; } case 3: { search_student1(); printf("按回车键返回主菜单"); getchar(); getchar(); menu(); break; } case 4: { change_student1(); printf("按回车键返回主菜单"); getchar(); getchar(); menu(); break; } case 5: { print_student1(iNumOfStu); printf("按回车键返回主菜单"); getchar(); getchar(); menu(); break; } case 6: { input_score1(); printf("按回车键返回主菜单"); getchar(); getchar(); menu(); break; } case 7: { sort_student1(); printf("按回车键返回主菜单"); getchar(); getchar(); menu(); break; } case 8: { save_student(stu,iNumOfStu); printf("按回车键返回主菜单"); getchar(); getchar(); menu(); break; } case 9: { print_help(); printf("按回车键返回主菜单"); getchar(); getchar(); menu(); break; } case 10: { exit_student(); } default: break; } } 运行结果： 源文件下载地址： http://115.com/file/clnq138g#一个简单的学生成绩管理系统.rar （请将此地址复制到浏览器地址栏中访问下载页面） #include<stdio.h> #include<string.h> #include<stdlib.h> #define N 100 int iNumOfStu=0; struct score { float math; float english; float computer; }; struct student { int number; char name[20]; struct score sco; float average; }; struct student stu[N]; void print_menu(void);//输出菜单 void choosemenu(void);//菜单选择 void input_student1(int);//输入学生信息 void input_student2(void);//输入总函数 void input_student3(int &,int);//判断学号是否重复 void input_student4(int,int);//覆盖原信息 void sort_student3(student s[],int);//按照英语成绩排序 void sort_student4(student s[],int);//按照计算机成绩排序 void sort_student2(student s[],int);//按照数学成绩排序 void sort_student5(student s[],int);//按照平均成绩排序 float input_score2(int);//计算学生平均成绩 void print_student2(void);//显示表头 void print_student3(int);//显示学生信息 void print_student1(int);//显示全部学生资料 void sort_student1(void);//排序总函数 void menu(void);//菜单调度总函数 int search_student2(int);//按学号查询学生信息并输出 void search_student3(int);//按平均分最高查询并输出 void search_student1(void);//查询总函数 void delete_student2(int,int);//删除学生信息 void delete_student1(void);//删除总函数 void change_student2(int);//修改学生资料 void change_student1(void);//修改总函数 void input_score3(int);//统计成绩 void input_score1(void);//统计成绩总函数 void print_help(void);//输出帮助信息 void exit_student(void);//退出系统 void save_student(student *,int);//保存学生信息 void main() { menu(); } void save_student(student *s,int a)//保存学生信息 { FILE *fp; if((fp=fopen("d:\\学生信息.txt","wb"))==NULL) { printf("不能打开文件！\n"); } else { printf("保存信息到D盘\n"); fprintf(fp,"本班所有学生具体信息如下：\r\n"); fprintf(fp," 学号 姓名 数学成绩 英语成绩 计算机成绩 平均成绩\r\n"); for(int i=0;i<a;i++) { fprintf(fp,"%8d%12s%14.2f%14.2f%14.2f%14.2f\n",stu[i].number,stu[i].name,stu[i].sco.math,stu[i].sco.english,stu[i].sco.computer,stu[i].average); fprintf(fp,"\r\n"); } fclose(fp); printf("信息保存成功！\n"); } } void exit_student(void)//退出系统 { exit(1); } void print_help(void)//输出帮助信息 { printf("本系统所能容纳的最大学生数为%d人\n学生信息保存在D盘根目录下，保存文件为“学生信息.txt”。\n感谢使用！\n",N); } void input_score1(void)//统计成绩总函数 { int c; c=search_student2(iNumOfStu); printf("学号：%d\n",stu[c].number); printf("姓名：%s\n",stu[c].name); input_score3(c); printf("新成绩录入成功！
标签： c语言
上传时间： 2019-06-09
上传用户：啊的撒旦
晶振晶振封装Altium Designer AD PCB封装库2D3D元件库文件PCB Library : 晶振.PcbLibDate : 2020/12/29Time : 14:42:25Component Count : 38Component Name-----------------------------------------------OSC 455E-LIOSC 455E-WIOSC 1612-4POSC 2025-4POSC 3215-2POSC 3225-4POSC 4025-4POSC 5032-2POSC 5032-4POSC 6035-2POSC 6035-4POSC 7050-2POSC 7050-4POSC 8045-2POSC 8045-4POSC 8045-4P-COSC HC-49SOSC HC-49SMDOSC HC-49UOSC MC-146OSC MC-156OSC MC-306OSC MC-405OSC MC-406OSC UM-1OSC UM-5OSC-2x6-LIOSC-2x6-WI-AOSC-2x6-WI-BOSC-2x6-WSOSC-3x8-LIOSC-3x8-WI-AOSC-3x8-WI-BOSC-3x8-WSOSC-3x10-LIOSC-3x10-WI-AOSC-3x10-WI-BOSC-3x10-WS
标签： 封装 altium designer
上传时间： 2022-03-12
上传用户：
表贴插装晶振、晶体Altium封装 AD封装库 2D+3D PCB封装库-6MB,Altium Designer设计的PCB封装库文件，集成2D和3D封装，可直接应用的到你的产品设计中。PCB库封装列表：CB Library : 晶振、晶体.PcbLibDate : 2020/6/8Time : 7:42:40Component Count : 38Component Name-----------------------------------------------OSC 455E-LIOSC 455E-WIOSC 1612-4POSC 2025-4POSC 3215-2POSC 3225-4POSC 4025-4POSC 5032-2POSC 5032-4POSC 6035-2POSC 6035-4POSC 7050-2POSC 7050-4POSC 8045-2POSC 8045-4POSC 8045-4P-COSC HC-49SOSC HC-49SMDOSC HC-49UOSC MC-146OSC MC-156OSC MC-306OSC MC-405OSC MC-406OSC UM-1OSC UM-5OSC-2x6-LIOSC-2x6-WI-AOSC-2x6-WI-BOSC-2x6-WSOSC-3x8-LIOSC-3x8-WI-AOSC-3x8-WI-BOSC-3x8-WSOSC-3x10-LIOSC-3x10-WI-AOSC-3x10-WI-BOSC-3x10-WS
标签： altium designer
上传时间： 2022-05-04
上传用户：canderile
