View Code of Problem 56

#include<stdio.h>
int main(){
	int h1,m1,s1,h2,m2,s2;
	int t1,t2,t; 
	int h3,m3,s3;
	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;
	if(t1>t2)
	t=t1-t2;
	else
	t=t2-t1;
	h3=t/3600;
	m3=t/60%60;
	s3=t%60;
	printf("%d:%02d:%02d",h3,m3,s3);
}