C program to read time in seconds and convert in time format using class

#include<stdio.h>
#include<conio.h>
void main() {
	int sec, h, m, s;
	printf("Enter time in seconds: ");
	scanf("%d", &sec);
	h = (sec/3600); 
	m = (sec -(3600*h))/60;
	s = (sec -(3600*h)-(m*60));
	printf("H:M:S - %d:%d:%d\n",h,m,s);
	getch();
}

Output: