prog.6.5.c

// Program to determine if a year is a leap year

#include <stdio.h>

int main (void)
{
	int year, rem_4, rem_100, rem_400;

	printf ("Enter the year to be tested: ");
	scanf  ("%i", &year);

	rem_4 = year % 4;
	rem_100 = year % 100;
	rem_400 = year % 400;

	if ( (rem_4 == 0 && rem_100 != 0) || rem_400 == 0 )
		printf ("It's a leap year.\n");
	else
		printf ("Nope, it's not a leap year.\n");

	return 0;
}