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<P align=left><FONT color=#ff9933><B><FONT color=#3300cc
size=5>经典c程序100例==91--100</FONT></B></FONT></P>
<P><FONT
color=#990000>【程序91】</FONT><BR>题目：时间函数举例1<BR>1.程序分析：<BR>2.程序源代码：<BR>#include
"stdio.h"<BR>#include "time.h"<BR>void main()<BR>{ time_t lt; /*define a
longint time varible*/<BR>lt=time(NULL);/*system time and
date*/<BR>printf(ctime(<)); /*english format
output*/<BR>printf(asctime(localtime(<)));/*tranfer to
tm*/<BR>printf(asctime(gmtime(<))); /*tranfer to Greenwich
time*/<BR>}<BR>==============================================================<BR><FONT
color=#990000>【程序92】</FONT><BR>题目：时间函数举例2<BR>1.程序分析： <BR>2.程序源代码：<BR>/*calculate
time*/<BR>#include "time.h"<BR>#include "stdio.h"<BR>main()<BR>{ time_t
start,end;<BR>int i;<BR>start=time(NULL);<BR>for(i=0;i<3000;i++)<BR>{
printf("\1\1\1\1\1\1\1\1\1\1\n");}<BR>end=time(NULL);<BR>printf("\1: The
different is
%6.3f\n",difftime(end,start));<BR>}<BR>==============================================================<BR><FONT
color=#990000>【程序93】</FONT><BR>题目：时间函数举例3<BR>1.程序分析：<BR>2.程序源代码：<BR>/*calculate
time*/<BR>#include "time.h"<BR>#include "stdio.h"<BR>main()<BR>{ clock_t
start,end;<BR>int i;<BR>double
var;<BR>start=clock();<BR>for(i=0;i<10000;i++)<BR>{
printf("\1\1\1\1\1\1\1\1\1\1\n");}<BR>end=clock();<BR>printf("\1: The
different is
%6.3f\n",(double)(end-start));<BR>}<BR>==============================================================<BR><FONT
color=#990000>【程序94】</FONT><BR>题目：时间函数举例4,一个猜数游戏，判断一个人反应快慢。（版主初学时编的）<BR>1.程序分析：<BR>2.程序源代码：<BR>#include
"time.h"<BR>#include "stdlib.h"<BR>#include "stdio.h"<BR>main()<BR>{char
c;<BR>clock_t start,end;<BR>time_t a,b;<BR>double var;<BR>int
i,guess;<BR>srand(time(NULL));<BR>printf("do you want to play it.('y' or
'n')
\n");<BR>loop:<BR>while((c=getchar())=='y')<BR>{<BR>i=rand()%100;<BR>printf("\nplease
input number you
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