C Program to Check Whether a Given Year is Leap Year or Not

#include<stdio.h>
#include<conio.h>

void main()
{
	 int y;
	 clrscr();
	 printf("Enter year: ");
	 scanf("%d", &y);
	 if( (y%400 == 0) || (y%4 == 0 && y%100 != 0) )
	 {
	  printf("%d is a leap year.", y);
	 }
	 else
	 {
	  printf("%d is not a leap year.", y);
	 }
	 getch();
}

Output

Run 1:
----------------
Enter year: 3000 ↲
3000 is not a leap year.

Run 2:
----------------
Enter year: 2004 ↲
2004 is not a leap year.