程序基本算法习题解析 用递归函数求 s=1+2+3+...+n 的和。

附上代码:

// Chapter6_2.cpp : Defines the entry point for the application.
// 用递归函数求 s=1+2+3+...+n 的和

#include "stdafx.h"
#include<iostream>
using namespace std;

int funSum(int n)
{
	if(n == 1)
		return 1;
	else
		return n+funSum(n-1);
}
int main()
{
	int n,sum;
	cout << "input n: ";
	cin >> n;
	sum = funSum(n);
	cout << "the sum is: " << sum << endl;
	system("pause");
	return 0;
}

运行结果如下:

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转载自blog.csdn.net/elma_tww/article/details/85018958