Factorial of a Number

#include<stdio.h>
long int fact(int n);
void main()
{
	long int n;
	printf("Enter the no ");
	scanf("%d",&n);
	printf("Factorial of %ld=%ld",n,fact(n));
}

long int fact(int n)
{
	if(n=0)
	    return 0;
	else
	  return n*fact(n-1);    
}