C Program to check leap year

#include <stdio.h>
#include <conio.h>
int 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();
return 0;
}