View Code of Problem 56

#include<stdio.h>
#include<math.h>
main(){
	int h1,m1,s1;
	int h2,m2,s2;
	int h3,m3,s3,d;
	scanf("%d:%d:%d",&h1,&m1,&s1);
	scanf("%d:%d:%d",&h2,&m2,&s2);
	d=fabs(h1*3600+m1*60+s1-h2*3600-m2*60-s2);
	h3=d/3600;
	m3=(d-h3*3600)/60;
	s3=d-h3*3600-m3*60;
	printf("%d:%02d:%02d",h3,m3,s3);
}