Leap year or not

Command Line Program to check if a year is Leap Year or Not

#include<stdio.h>
void main(int argc,char *argv[])
{
	int n;
	n=atoi(argv[1]);
	if(n%4==0)
	{
		if(n%100==0)
		{
			if(n%400==0)
			
				printf("Leap Year");
				else
				printf("Not Leap Year");
		}
		else
		printf("Leap Year");
   }
    else
    printf("Not Leap Year");
	getch();	
	
}