View Code of Problem 56

#include<stdio.h>
#include<math.h>
#include <string.h>
#define Max 1000
int main()
{
  int h1, h2, m1, m2, s1, s2, t1, t2, del;
  t1 = t2 = 0;
  scanf("%d:%d:%d",&h1, &m1, &s1);
  scanf("%d:%d:%d",&h2, &m2, &s2);
   t1 = h1 * 3600 + m1 * 60 + s1;
   t2 = h2 * 3600 + m2 * 60 + s2;
  del=fabs(t1-t2);
 int a, b, c;
 a = del / 3600;
 b = del / 60 % 60;
 c = del % 60;
 printf("%d:%02d:%02d\n",a, b, c);
 return 0;
}