using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Day028_1
{
class Recurrence
{
public int sum(int x)
{
if (x==1)
{
return x;
}
else
return x + sum(x - 1);
}
}
class Program
{
static void Main(string[] args)
{
//使用递归算法来实现计算1+2+3+4+…+100的结果
Console.WriteLine("使用递归算法来实现计算1+2+3+4+…+x的结果");
int x = int.Parse( Console.ReadLine());
Recurrence sum = new Recurrence();
Console.WriteLine(sum.sum(x));
Console.ReadKey();
}
}
}
02-08
1510

04-06
3155

11-02