View Code of Problem 56

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int h1,h2,m1,m2,s1,s2;
    scanf("%d:%d:%d",&h1,&m1,&s1);
    scanf("%d:%d:%d",&h2,&m2,&s2);
    int cha = fabs(h1 * 3600+m1*60+s1-h2*3600-m2*60-s2);
    int h = cha / 3600;
    int m = cha %3600/60;
    int s = cha %3600 %60;
    printf("%d:%02d:%02d",h,m,s);
    return 0;
}