12.Print Leap year:

#include<stdio.h>
int main()
{
    int year;
    printf("Enter any year for test leap year:");
    scanf("%d",&year);
    if(((year%4)==0)&&((year%100)!=0)||((year%400)==0))
    printf("\n This enter %d is leap year\n",year);
    else
    printf("\nThis enter %d isn't leap year\n",year);
    return 0;
}