// Lab3.0.cpp : Этот файл содержит функцию "main". Здесь начинается и заканчивается выполнение программы.
//

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

using namespace std;

void Task1(int *&mass, int &N);
void Task2(int *&mass, int &N);
void Task3(int *&mass, int &N);
void Task4(int *&mass, int &N);

int main()
{
    int N, ch;
    cout << "Enter integer values: ";
    cin >> N;
    int *mass = new int[N];
    ifstream ff("text.txt");
    if (!ff)
        return 0;
    for (int i = 0; i < N; i++)
    {
        ff >> mass[i];
        cout << mass[i] << " ";
    }
    ff.close();
    cout << endl;
    cout << "1) Task 1" << endl << "2) Task 2" << endl << "3) Task 3" << endl << "4) Task 4" << endl;
    cin >> ch;
    if (ch == 1)
    {
        Task1(mass, N);

    }
    if (ch == 2)
    {
        Task2(mass, N);
    }
    if (ch == 3)
    {
        Task3(mass, N);
    }
    if (ch == 4)
    {
        Task4(mass, N);
    }

    delete[] mass;
    return 0;
}


void Task1(int *&mass, int &N)
{
    int *NewMass = new int[N];
    int x;
    for (int i = 0; i < N; i++)
    {
        NewMass[i] = mass[i];
        if (NewMass[i] < 0) {x = NewMass[i] * NewMass[i]; cout << x << " ";
        }
        else { cout << NewMass[i] << " "; }

    }
    delete[] mass;
    mass = NewMass;
}

void Task2(int *&mass, int &N)
{
    int a; double b; //a- число которое вводим, b - квадрат положительных чисел
    int *newMass = new int[N];
    cout << "Enter a: "; cin >> a;
    for (int i = 0; i < N; i++)
    {
        newMass[i] = mass[i];
        if (newMass[i] > 0 && newMass[i] > a) { b = sqrt(newMass[i]); cout << b << " "; }
        else { cout << newMass[i] << " "; }
    }


    delete[] mass;
    mass = newMass;
}

void Task3(int *&mass, int &N)
{
    int *newMass = new int[N];
    int max, min, sum = 0, composition = 1;
    for (int i = 0; i < N; i++) { newMass[i] = mass[i]; }
    max = newMass[0];
    min = newMass[0];
    for (int i = 0; i < N; i++) {
        if (newMass[i] < min) min = newMass[i];
        if (newMass[i] > max) max = newMass[i];
    }
    sum = max + min;
    composition = max * min;
    for (int i = 0; i < N; i++) {
        if (newMass[i] == max) cout << sum << " ";
        else if (newMass[i] == min) cout << composition << " ";
        else cout << newMass[i] << " ";
    }
    delete[] mass;
    newMass = mass;
}

void Task4(int *&mass, int &N)
{
    int *newMass = new int[N];
    for (int i = 0; i < N; i++) { newMass[i] = mass[i]; }
    for (int i = 1; i < N; i += 2)
    {
        int j = newMass[i - 1];
        newMass[i - 1] = newMass[i];
        newMass[i] = j;
    }
    cout << "New mass: " << endl;
    for (int i = 0; i < N; i++)
    {
        cout << newMass[i] << " ";

    }
    delete[] mass;
    newMass = mass;
}