View Code of Problem 56

#include<stdio.h>
#include <math.h>
#include <string.h>
int main()
{
	int h,m,s,h1,m1,s1;
	int x1,x2,x,a,b,c;
	scanf("%d:%d:%d",&h,&m,&s);
	scanf("%d:%d:%d",&h1,&m1,&s1);
	x1=3600*h+60*m+s;
	x2=3600*h1+60*m1+s1;
	
	x=fabs(x1-x2);
	
	a=x/3600;
	b=x/60%60;
	c=x%60;
	printf("%d:%02d:%02d",a,b,c);
	
	return 0;
}