View Code of Problem 56

#include <stdio.h>
#include <math.h>
#include <windows.h>



int main() {
	int a, b, c, d, e, f;
	scanf("%d:%d:%d %d:%d:%d", &a, &b, &c, &d, &e, &f);
	int temp_1, temp_2, temp_3;
	temp_1 = a * 3600 + b * 60 + c;
	temp_2 = d * 3600 + e * 60 + f;
	temp_3 = abs(temp_1 - temp_2);
	printf("%d:%02d:%02d", temp_3/3600, (temp_3%3600)/60, (temp_3%3600)%60);
}
/*
Main.c:3:21: fatal error: windows.h: No such file or directory
 #include <windows.h>
                     ^
compilation terminated.
*/