Check whether a year is leap year or not.

#include <stdio.h>

#include <conio.h>

void main()

{

  int year;

  clrscr();

  printf("Enter a year to check if it is a leap year\n");

  scanf("%d", &year);

  if ( year%400 == 0)

    printf("%d is a leap year.\n", year);

  else if ( year%100 == 0)

    printf("%d is not a leap year.\n", year);

  else if ( year%4 == 0 )

    printf("%d is a leap year.\n", year);

  else

    printf("%d is not a leap year.\n", year); 

  getch();

}

Output of program: