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1、c语言100例及教程c语言案例10（100casesofClanguageandtutorialclanguagecase10）==91--100:.:classicCprogram100cases:ClassicCprogram:100casesof==91--100[program91]Title:timefunctionexample11.programanalysis:2.programsourcecode:#include"stdio.h""#include"time.h""Voidmain(){time_tlt;/*defineaLon
2、ginttimevarible*/Lt=time(NULL);/*systemtimeanddate*/Printf(CTime(<));/*englishformatoutput*/Printf(asctime(Localtime(<)));/*tranfertotm*/Printf(asctime(gmtime(<)));/*tranfertoGreenwichtime*/}==============================================================[program92]Title:timefun
3、ctionexample21.programanalysis:2.programsourcecode:/*calculatetime*/#include"time.h""#include"stdio.h""(main){time_tstart,end;Inti;Start=time(NULL);For(i=0;i<3000;i++){printf("1111111111");}End=time(NULL);Printf("1:Thedifferentis%6.3f",difftime(end,start));}====
4、==========================================================[program93]Title:timefunctionexample31.programanalysis:2.programsourcecode:/*calculatetime*/#include"time.h""#include"stdio.h""(main){clock_tstart,end;Inti;Doublevar;Start=clock();For(i=0;i<10000;i++){printf("11111
5、11111");}End=clock();Printf("1:Thedifferentis%6.3f",(double)(end-start);}==============================================================[program94]Title:timefunctionexample4,aguessinggame,judgeaperson'sreactionspeed.(moderatorsarebeginners.)1.programanalysis:2.program
6、sourcecode:#include"time.h""#include"stdlib.h""#include"stdio.h""(main){charc;Clock_tstart,end;Time_ta,b;Doublevar;Inti,guess;Srand(time(NULL));Printf("doyouwanttoplayit.('y'or'n')");Loop:While((c=getchar())=='y'){I=rand()%100;Printf("pleaseinputnumberyouguess:");Start=c
7、lock();A=time(NULL);Scanf("%d",&guess);While(guess!=i){if(guess>i){printf("pleaseinputalittlesmaller.");Scanf("%d",&guess);}Else{printf("pleaseinputalittlebigger.");Scanf("%d",&guess);}}End=clock();B=time(NULL);Printf("1:Ittookyou%6.3fseconds",var=(double)(end-start)/18
8、.2);Printf("1:ittookyou%6.3fseconds",difftime(B,a));If(v
