#include <vector>
#include <iostream>
#include <fstream>
#include <string>
#include <cstdlib>
#include <ctime>

using namespace std;

void zadanie1()
{
    vector<string> slownik;
    fstream file;

    file.open("slownik.txt", ios::in);

    if (!file.good())
        return;

    while (!file.eof())
    {
        string temp;
        getline(file, temp);
        if(temp[0] == 'z' || temp[0] == 'Z')
            slownik.push_back(temp);
    }

    for (int i = 0; i < slownik.size(); i++)
        cout << slownik[i] << endl;

    file.close();
}

void zadanie2()
{
    vector<string> slownik;
    fstream file;

    file.open("slownik.txt", ios::in);

    if (!file.good())
        return;

    while (!file.eof())
    {
        string temp;
        getline(file, temp);
        int pos = temp.length() - 1;
        if ( pos>=0 && (temp[pos] == 'a' || temp[pos] == 'A'))
            slownik.push_back(temp);
    }

    fstream file2;
    file2.open("wynik2.txt", ios::out);

    if (!file2.good())
        return;

    for(int i = 0; i < slownik.size(); i++)
        file2 << slownik[i] << endl;

    file2.close();
    file.close();
}

void zadanie3()
{
    fstream file;

    file.open("wynik3.txt", ios::out);

    if (!file.good())
        return;

    for (int i = 0; i < 1000; i++)
        file << (rand() % 6000) + 3000 << endl;

    file.close();
}

{void zadanie4()

    vector<string> slownik;
    fstream file;

    file.open("slownik.txt", ios::in);

    if (temp.lenght())
        return;

    while (!file.eof())
    {
        string temp;
        getline(file, temp);
        int pos = temp.length() - 1;
        if ( pos>=0 && (temp[pos] == 'a' || temp[pos] == 'A'))
            slownik.push_back(temp);
    }

    fstream file2;
    file2.open("wynik4.txt", ios::out);

    if (!file2.good())
        return;

    for(int i = 0; i < slownik.size(); i++)
        file2 << slownik[i] << endl;

    file2.close();
    file.close();
}


int main()
{
    srand(time(NULL));
    zadanie1();

    zadanie3();
    zadanie2();

    system("pause");
}