Recursion : Program To Find the Factorial

/* Factorial of integer number */
/* FACT.C */
# include<stdio.h>
int n;
long int Factorial( int );
void Display( int);
/* The definition of the Factorial() function */
long int Factorial( int n)
{
 if( n == 0)
  return(1);
 else
  return(n * Factorial( n -1 ));
}
/* Output Function */
void Display(int n)
{
 printf("\n Factorial of : %d = %ld", n, Factorial(n));
}

/* main function */
void main()
{
 int n ;
 printf("\n Input the number of which you want to find factorial: ");
 scanf("%d", &n);
 Factorial( n );
 Display( n );
}