[小算法] 求高于平均分的学生学号及成绩（学号和成绩从文件读取）

#include "stdafx.h"
#include <iostream>
#include <fstream>

using namespace std;

ifstream fin("data.txt");

double find(int total, int n);

int main()
{
    double average = find(0, 0);
    cout << "Average: " << average << endl;
    system("pause");
    return 0;
}

double find(int total, int n)
{
    int number, score;
    double average;
    fin >> number >> score;
    if(number != 0)
    {
        cout << number << ": " << score << endl;
        average = find(total + score, n + 1);
        if(score >= average)
        {
            cout << number << ": " << score << endl;
        }
        return average;
    }
    return (double)total / n;
}

 

data.txt 文件内容如下：

1 25

2 33

3 45

4 36

5 29

6 64

7 18

8 22

9 26

10 21

0 0