PATB1026

头文件time.h clock() CLK_TCK 

用函数获得C1再用函数函数获得C2

C2-C1除以常数得到时间差

注：可能时分秒是个位数，因此输出时要用#02d；

#include <cstdio>#include <ctime>#include <cmath>int main(){    int C1,C2,s;    scanf("%d%d",&C1,&C2);    if((C2-C1)%100>=50)    {s = (C2-C1)/100+1;}    else {s = (C2-C1)/100; }    printf("%02d:%02d:%02d",s/3600,s%3600/60,s%60);    return 0;}int test(){    int c1,c2;    scanf("%d%d",&c1,&c2);    int ans = c2 - c1;    if(ans % 100 >= 50){ ans = ans/100 +1;    }else {ans = ans/100;    }    printf("%02d:%02d:%02d\n",ans / 3600, ans%3600/60,ans%60);    return 0;}