写一个程序用递归法打印给定数字的阶乘？

参考代码实现：

#include<stdio.h>      
#include<conio.h>      
 long factorial(int n)    // function to calculate the factorial of a given number.   
{      
  if (n == 0)      
    return 1;      
else      
return(n * factorial(n-1));    //calling the function recursively.  
}      
 void main()      
{      
  int number;    //declaration of variables.  
  long fact;      
  clrscr();      
  printf("Enter a number: ");      
  scanf("%d", &number);       
  fact = factorial(number);    //calling a function.  
  printf("Factorial of %d is %ld
", number, fact);      
  getch();   //It reads a character from the keyword.   
}