View Code of Problem 56

#include <stdio.h>
#include <string.h>
void main() 
{
	int h_1, m_1, s_1;
	int h_2, m_2, s_2;
	int h, m, s;
	int t1, t2;
	scanf("%d:%d:%d", &h_1, &m_1, &s_1);
	scanf("%d:%d:%d", &h_2, &m_2, &s_2);
	t1 = h_1 * 3600 + m_1 * 60 + s_1;
	t2 = h_2 * 3600 + m_2 * 60 + s_2;
	if (t1 > t2)
	{
		int t = t1;
		t1 = t2;
		t2 = t;
	}
	h = (t2 - t1) / 3600;
	m = (t2 - t1 - h * 3600) / 60;
	s = t2 - t1 - h * 3600 - m * 60;
	printf("%d:", h);
	if (m < 10)
	{
		printf("0%d:", m);
	}
	else
	{
		printf("%d:", m);
	}
	if (s < 10)
	{
		printf("0%d", s);
	}
	else
	{
		printf("%d", s);
	}
}