大佬们，这道题咋解啊

#include <iostream>
#include <fstream>
#include <vector>
#include <algorithm>
using namespace std;

bool readF(vector<int> &vec, int &lineNumber)
{
    int score = 0;
    ifstream infile;   //输入流
    infile.open("C:\\Users\\Ans\\Desktop\\score.txt", ios::in);

    if (!infile.is_open())
        return false;

    while (!infile.eof()) // 未结束一直读
    {
        infile >> score;
        vec.push_back(score);
        lineNumber++;
    }

    infile.close();

    return true;
}

int main()
{
    vector<int> v;
    int lineNumber = 0;
    readF(v, lineNumber);

    sort(v.begin(), v.end());

    int max = 0, min = 0, all = 0;
    for (int i = 0; i < v.size(); i++)
    {
        all += v[i];

        if (v[i] > max)
            max = v[i];

        if (v[i] < min)
            min = v[i];

        cout << v[i] << " ";

        if (!((i+1) % 5))
            cout << endl;
    }

    cout << (max - min) / (all / lineNumber) << endl;

 
    return 0;
}