#include <iostream>
#include <vector>
#include <string>
#include <fstream>
#include <sstream>
#include <list>
#include <iterator>
#include <cstdlib>
#include <math.h>
#include <set>

using namespace std;

void view()
{
    ifstream in("C:\\newfile.txt");
	list<string> lines;
	while(!in.eof())
    {
		string temp;
		getline(in, temp, '\n');
		if(temp != "")
         lines.push_back(temp);
	}
	for (string x : lines)
	cout << x << endl;
	in.close();
}

string sum(string temp)
{
    vector<string> tokens;
	istringstream iss(temp);
	copy(istream_iterator<string>(iss), istream_iterator<string>(), back_inserter(tokens));
	double sum = 0;
    for (int i = tokens.size()-1 ; i >= 4; i--)
	{
	    string a = tokens[i];
		sum = sum + atoi(a.c_str());
	}
	sum /= 4;
	temp = temp + " " + to_string(sum);
	return temp;
};

void add()
{
    ifstream in("C:\\newfile.txt");
	list<string> lines;
	while(!in.eof())
    {
		string temp;
		getline(in, temp, '\n');
		if(temp != "")
         lines.push_back(temp);
	}
	string temp;
	cout << "Vvedite studenta: " << endl;
	cin.get();
	getline(cin, temp, '\n');
	temp = sum(temp);
	lines.push_back(temp);
	ofstream out("C:\\newfile.txt");
	copy(lines.begin(), lines.end(), ostream_iterator<string> (out, "\n"));
	in.close();
	out.close();
	cout << "dobavlen" << endl;
}

void edit()
{
    ifstream in("C:\\newfile.txt");
	vector<string> lines;
	while(!in.eof())
    {
		string temp;
		getline(in, temp, '\n');
		if(temp != "")
         lines.push_back(temp);
	}
	cout << "VVedite nomer studenta kotorogo xotite izmenit': ";
	int num;
	cin >> num;
	for (int i = 0; i < lines.size(); i++)
    {
        if(i == num-1)
        {
            string temp;
            cin.get();
            getline(cin, temp);
            temp = sum(temp);
            lines[i] = temp;
        }
    }
    ofstream out("C:\\newfile.txt");
	copy(lines.begin(), lines.end(), ostream_iterator<string> (out, "\n"));
	in.close();
	out.close();
}

void find()
{
    ifstream in("C:\\newfile.txt");
	vector<string> lines;
	while(!in.eof())
    {
		string temp;
		getline(in, temp, '\n');
		if(temp != "")
         lines.push_back(temp);
	}
	cout << "VVedite nomer groupi: ";
	int group;
	cin >> group;
	set<string> findResult;
	for (int i = 0; i < lines.size(); i++)
    {
        string temp;
        temp = lines[i];
        vector<string> tokens;
        istringstream iss(temp);
        copy(istream_iterator<string>(iss), istream_iterator<string>(), back_inserter(tokens));
        for (int i = 0; i < tokens.size(); i++)
        {
            if( tokens[2] == to_string(group) && (tokens[i] == "0"|| tokens[i] == "1"|| tokens[i] == "2"||tokens[i] == "3" ))
            {
                findResult.insert(temp);
            }
        }
    }
    for (string x : findResult)
	cout << x << endl;
	ofstream out("C:\\out.txt");
	copy(findResult.begin(), findResult.end(), ostream_iterator<string> (out, "\n"));
	in.close();
	out.close();
}


int main()
{
    int a;
    cout << "1 - VIEW, 2 - ADD, 3 - EDIT, 4 - FIND" << endl;
    cout << "choise: ";

    while(true)
    {
    cin >>  a;
    switch (a)
    {
        case 1:
            view();
            break;
        case 2:
            add();
            break;
        case 3:
            edit();
            break;
        case 4:
            find();
            break;
    }
    }

    system("pause");
    return 0;
}