/* timestamp.c			*/
/* the sum of the timestamps	*/
/* author: Weiwei Chen		*/
/* date: Oct. 5. 2010		*/

#include <stdio.h>

int main(void)
{
	int s1 = 0, m1 = 0, h1 = 0; /*timestamp1, sec, min, hr	*/
	int s2 = 0, m2 = 0, h2 = 0; /*timestamp2, sec, min, hr		*/
	int s = 0, m = 0, h = 0;    /*timestamp, sec, min, hr 		*/
	int tmp1 = 0, tmp2 = 0;	    /*temporary variables		*/
	int sum = 0;		    /*sum of the timestamps in seconds	*/

	printf("Please enter two timestamp values s1, m1, h1, s2, m2, h2 \n");

	printf("s1: ");
	scanf("%d", &s1);
	printf("m1: ");
	scanf("%d", &m1);
	printf("h1: ");
	scanf("%d", &h1);
	printf("Timestamp 1 is %d seconds, %d minutes, %d hours. \n", s1, m1, h1);

	printf("s2: ");
	scanf("%d", &s2);
	printf("m2: ");
	scanf("%d", &m2);
	printf("h2: ");
	scanf("%d", &h2);
	printf("Timestamp 2 is %d seconds, %d minutes, %d hours. \n", s2, m2, h2);

	tmp1 = h1 * 60 * 60 + m1 * 60 + s1;
	tmp2 = h2 * 60 * 60 + m2 * 60 + s2;
	sum = tmp1 + tmp2;

	s = sum % 60;
	sum = sum / 60;
	m = sum % 60;
	sum = sum / 60;
	h = sum;

	printf("The sum of the timestamp is %d seconds, %d minutes, %d hours. \n", s, m, h);
	
	return 0;
}