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1、题目：时间函数举例1.程序分析：2.程序源代码：#include stdio.h#include time.hvoid main()time_t lt; /*define a longint time varible*/lt=time(NULL);/*system time and date*/printf(ctime(); /*english format output*/printf(asctime(localtime();/*tranfer to tm*/printf(asctime(gmtime(); /*tranfer to Greenwich time*/【程序92】题目：时间函数
2、举例21.程序分析：2.程序源代码：/*calculate time*/#include time.h#include stdio.hmain() time_t start,end;int i;start=time(NULL);for(i=0;i3000;i+)printf(1111111111n);end=time(NULL);printf(1: The different is %6.3fn,difftime(end,start);【程序93】题目：时间函数举例31.程序分析：2.程序源代码：/*calculate time*/#include time.h#include stdio.h
3、main() clock_t start,end;int i;double var;start=clock();for(i=0;ii)printf(please input a little smaller.n);scanf(%d,&guess);elseprintf(please input a little bigger.n);scanf(%d,&guess);end=clock();b=time(NULL);printf(1: It took you %6.3f secondsn,var=(double)(end-start)/18.2);printf(1: it took you %6.3f secondsnn,difftime(b,a);if(var15)printf(11 You are very clever! 11nn);else if(var25)printf(11 you are normal! 11nn);elseprintf(11 you are stupid! 11nn);printf(11 Congradulations 11nn);printf(The number you guess is %d,i);printf(ndo you want to try it again?(yy.or.n)n);if(c=getch()=y)goto loop;
