fac2_1_1.java

java 算法设计与分析的好资料.由王晓东先生主编.

//本程序取自王晓东编著“算法分析与设计”第 20 页，例2-1_1
//递归法计算阶乘
 import  java.io.*;
public class Fac2_1_1{
   public static int Factorial(int n)
  {
    if(n==0)return 1;
    return n*Factorial(n-1);
  }
 public static void main(String args[])throws IOException      
   {
   System.out.println("阶乘值 ");
   InputStreamReader iin=new InputStreamReader(System.in);
   BufferedReader bin=new BufferedReader(iin);  
   int n;
   n=Integer.parseInt(bin.readLine());
   System.out.println(Factorial(n));
  }
}