5-10.lst

一些简单的c51程序

C51 COMPILER V7.09   5_10                                                                  08/25/2005 11:20:35 PAGE 1   


C51 COMPILER V7.09, COMPILATION OF MODULE 5_10
OBJECT MODULE PLACED IN 5-10.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE 5-10.c LARGE BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include <REG52.H>                /* special function register declarations   */
   2                                            /* for the intended 8051 derivative         */
   3          
   4          #include <stdio.h>                /* prototype declarations for I/O functions */
   5          #include <string.h>
   6          #include <ctype.h>
   7          #include <stdlib.h>
   8          
   9          #ifdef MONITOR51                         /* Debugging with Monitor-51 needs   */
              char code reserve [3] _at_ 0x23;         /* space for serial interrupt if     */
              #endif                                   /* Stop Exection with Serial Intr.   */
  12                                                   /* is enabled                        */
  13          #define classes 3
  14          #define grades 30
  15          
  16          
  17          
  18          
  19          void disp_grades(int g[ ][grades]) /*显示学生成绩*/
  20          {
  21   1              int t ,i ;
  22   1              for(t=0; t<classes; ++t) {
  23   2                      printf("class # %d:\n",t + 1 ) ;
  24   2                      for(i=0;i<grades;++i)
  25   2                      printf("grade for student #%d is %d\n",i+1,g [t][i] ) ;
  26   2              }
  27   1      }
  28          int get_grades(int num)
  29          {
  30   1              char s[80];
  31   1              printf("enter grade for student # %d:\n",num+1) ;
  32   1              scanf("%s",s);/*输入成绩*/
  33   1              return(atoi(s));
  34   1      }
  35          
  36          void enter_grades(int a[][grades])
  37          {
  38   1              int t, i;
  39   1              for (t=0;t<classes;t++)
  40   1              {
  41   2                      printf (" class #%d:\n",t+1);
  42   2                      for (i=0; i<grades; i++)
  43   2                      a[t][i]=get_grades(i);
  44   2              }
  45   1      }
  46          
  47          /*------------------------------------------------
  48          The main C function.  Program execution starts
  49          here after stack initialization.
  50          ------------------------------------------------*/
  51          void main (void) {
  52   1      
  53   1              int a[classes][grades];/*定义二维数组，每行存放一个班学生成绩 */
  54   1              char ch;
  55   1      /*------------------------------------------------
C51 COMPILER V7.09   5_10                                                                  08/25/2005 11:20:35 PAGE 2   

  56   1      Setup the serial port for 1200 baud at 16MHz.
  57   1      ------------------------------------------------*/
  58   1      #ifndef MONITOR51
  59   1          SCON  = 0x50;                       /* SCON: mode 1, 8-bit UART, enable rcvr      */
  60   1          TMOD |= 0x20;               /* TMOD: timer 1, mode 2, 8-bit reload        */
  61   1          TH1   = 221;                /* TH1:  reload value for 1200 baud @ 16MHz   */
  62   1          TR1   = 1;                  /* TR1:  timer 1 run                          */
  63   1          TI    = 1;                  /* TI:   set TI to send first char of UART    */
  64   1      #endif
  65   1      /*------------------------------------------------
  66   1      Note that an embedded program never exits (because
  67   1      there is no operating system to return to).  It
  68   1      must loop and execute forever.
  69   1      ------------------------------------------------*/
  70   1              for( ; ;)
  71   1              {
  72   2                      do { /*菜单显示*/
  73   3                              printf("(E)nter grades\n");
  74   3                              printf("(R)eport grades\n");
  75   3                              printf("(Q)uit\n");
  76   3                              ch=toupper(getchar()); /*将键盘输入字符转换大写*/
  77   3                      } while(ch!='E' && ch!='R' && ch!='Q');
  78   2                      switch(ch)
  79   2                      {
  80   3                              case 'E':
  81   3                              enter_grades(a);
  82   3                              break;
  83   3                              case 'R':
  84   3                              disp_grades(a);
  85   3                              break;
  86   3                              case 'Q':printf("Quit This Program");
  87   3                              while(1);
  88   3                      }
  89   2              }
  90   1          while (1) {};
  91   1      }
  92          
  93          
  94          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    549    ----
   CONSTANT SIZE    =    148    ----
   XDATA SIZE       =   ----     274
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)