#include <stdio.h>
int main(void)
{
	short year, years_left;
	char is_leap_year = 'n';
	printf("Enter year for leap year check: ");   
	scanf("%hd", &year);
	if (year % 4 == 0)			/* Includes 1900,2000,2008 */
		if (year % 100 == 0)		/* Example year 1900 */
			if (year % 400 == 0)	/* Example year 2000 */
				is_leap_year = 'y';
			else			/* Examples year 2008 */
				years_left = 4;
		else				/* Not a leap year */ 
			is_leap_year = 'y';
	else
		years_left = 4 - year % 4;
	/* We now know whether it is a leap year or not */
	if (is_leap_year == 'y')
		printf("%d is a leap year. \n", year);
	else
		printf("%d is not a leap year. Next leap year: %d.\n",
		year, year+ years_left);
	return 0;
}