程序运行时间

题源

PTA 乙级

题解

#include<stdio.h>
#define CLK_TCK 100
long C1,C2;
int h,m,s;
int main(){
    scanf("%ld %ld",&C1,&C2);
    C2 -= C1;
    h = C2/100/3600;
    m = C2/100/60%60;
    s = C2%6000/100.0+0.5;
    printf("%02d:%02d:%02d",h,m,s); 
    getchar();getchar();
    return 0;
}