new_lesson1

#include <iostream>

using std::cout;
using std::cin;
using std::endl;

void unforget() {
    std::cout << "Hello world" << std::endl;

    unsigned int val1 = 12;
    short val2 = 3434;
    long val3 = 314443;

    double pi_val = 3.14;
    float pi_rrr = -12.345;

    char ch = 'f';

    int arr[5]{ 1,2,3,4,5 };

    for (int k = 0; k < 5; ++k) {
        arr[k] = 5 - k;
    }

    int n = 0;

    while (n < 5) {
        ++n;
        arr[n] = (n < 3) ? 1 : 2;
    }

    do {
        --n;
        if ((n > 0) && (n < 3))
            arr[n] = 0;
        else
            arr[n] -= 2;
    } while (n >= 0);

    enum Mode { Sleep, Work };
    Mode mode = Sleep;

    switch (mode)
    {
    case Sleep:
        std::cout << "Sleep";
        break;
    case Work:
        std::cout << "Work";
        break;
    default:
        std::cout << "Unknown mode";
        break;
    }

    setlocale(LC_ALL, "Russian");

    std::cin >> val1;
}

void reference() {
    int a = 5;
    cout << &a << " " << a << endl;
    int veryLongAndnonComfortabeleName = 15;
    int &val = veryLongAndnonComfortabeleName;
    val++;
    cout << veryLongAndnonComfortabeleName
        << " " << val << endl;
    cout << &veryLongAndnonComfortabeleName
        << " " << &val << endl;
    veryLongAndnonComfortabeleName = -123;
    cout << veryLongAndnonComfortabeleName
        << " " << val << endl;
    cout << &veryLongAndnonComfortabeleName
        << " " << &val << endl;
}

void pointers() {
    int val = 12;
    int * pval = &val;

    cout << pval << " " << &val << endl;
    cout << *pval << " " << val << endl;

    char ch = 'g';
    char* pch = &ch;

    cout << std::hex << (int)(pch) << " " << (int)(&ch) << endl;
    cout << *pch << " " << ch << endl;
}

void pointers_vs_array() {
    double arr[5]{ 0.1, 0.2, 0.3, 0.4, 0.5 };

    cout << *arr << " "
        << *(&(arr[0])) << " "
        << arr[0] << endl << endl;

    // arr[k] ~ *(arr + k)

    double* pa = &(arr[0]);
    double* pb = &(arr[4]);

    cout << pa - pb << endl;

    cout << arr << " "
        << arr + 1 << " "
        << arr[0] << " "
        << *(arr + 1) << endl;

    cout << endl;

    for (int k = 0; k < 5; ++k) {
        cout << *(arr + k) << " ";
    }
    cout << endl;

    for (double* pk = arr; pk <= &(arr[4]); pk++) {
        cout << *pk << " ";
    }
    cout << endl;
}


void maxVal() {
    int a = 5;
    int b = 10;
    // дальше a и b - не используем
    int* pa = &a;
    int* pb = &b;
    cout << ((*pa > *pb) ? (*pa) : (*pb));
    cout << endl;
}

void getSign() {
    int val = 0;
    int *pval = &val;
    cout << "Enter number: ";
    cin >> *pval;
    if (*pval > 0) {
        cout << "positive";
    } else if (*pval < 0) {
        cout << "negative";
    } else {
        cout << "zero";
    }
    cout << endl;
}

void my_swap1() {
    int a = 5;
    int b = 7;
    //ваш код
    int tmp = a;
    a = b;
    b = tmp;
    cout << a << " " << b << endl;
    //надо: 7 5
}

void my_swap2() {
    int a = 5;
    int b = 7;
    //ваш код
    a = a + b;
    b = a - b;
    a = a - b;
    cout << a << " " << b << endl;
    //надо: 7 5
}

void logicBits() {
    int a = 5; // 101
    int b = 6; // 110

    cout << a << " | " << b << " = "
        << (a | b) << endl;
    cout << a << " & " << b << " = "
        << (a & b) << endl;
    cout << a << " ^ " << b << " = "
        << (a ^ b) << endl;


}

void shift() {
    int x = 1;
    int y = 2;

    const int Ny = 4;
    const int Nx = 3;

    while (x < 0)
        x += Nx;
    while (y < 0)
        y += Ny;



    int arr[Ny][Nx]{ {1, 2, 3},
                   {4, 5, 6},
                   {7, 8, 9},
                   {4, 6, 8} };

    for (int ky = 0; ky < Ny; ky++) {
        for (int kx = 0; kx < Nx; kx++)
            cout << arr[ky][kx] << " ";
        cout << endl;
    }

    int arr2[Ny][Nx];

    for (int ky = 0; ky < Ny; ky++)
        for (int kx = 0; kx < Nx; kx++)
            // тут правильная строчка кода

    for (int ky = 0; ky < Ny; ky++) {
        for (int kx = 0; kx < Nx; kx++)
            cout << arr2[ky][kx] << " ";
        cout << endl;
    }
    /*
    * in:
    * 1 2 3
    * 4 5 6
    * 7 8 9
    * 4 6 8
    *
    * out:
    * 8 9 7
    * 6 8 4
    * 2 3 1
    * 5 6 4
    */

}

void main() {
    shift();
}