java递归

import java.util.Scanner;
class DG
{
 public int count(int n){
  if(n==1)
   return 1;
  else
   return count(n-1)+n;
 }
}
public class Test
{
 public static void main(String[] args){
  Scanner sc = new Scanner(System.in);
  DG dg = new DG();
  System.out.print("请输入一个数：");
  int n =sc.nextInt();
  System.out.println(dg.count(n));

 

 }
}

来源：oschina

链接：https://my.oschina.net/u/988276/blog/117581