lesson_321_23

#include "Header.h"
#include <iostream>

using namespace std;

int glob_sad = 12;
//int glob_sad = 15;



int sum(int a, int b, int c = 0) {
    return a + b + c;
}

void say_hello() {
    static int n = 0;
    switch (n)  {
        case 0: cout << "Good morning" << endl; break;
        case 1: cout << "Good arternoon" << endl; break;
        case 2: cout << "Good evening" << endl; break;
        case 3: cout << "Good night" << endl; break;

        default: break;
    }
    //n = ++n % 3;
    n = n + 1;
    n = n % 4;
}

void task_hello() {
    char ch = 'y';
    while (ch != 'n') {
        cin >> ch;
        say_hello();
    }
}

/// <summary>
/// copy_invert
/// </summary>
/// <param name="size"></param>
/// <param name="arr"></param>
/// <param name="copy_arr"></param>
void copy_invert(int size, int* arr, int* copy_arr) {
    for (int k = 0; k < size; k++) {
        *(copy_arr + k) = *(arr + size - 1 - k);
    }
}

void test_copy_invert() {
    int arr[]{ 88,89,90,91,92 };
    int copy_arr[5];
    copy_invert(size(arr), arr, copy_arr);

    if (copy_arr[0] == 92 &&
        copy_arr[1] == 91 &&
        copy_arr[2] == 90 &&
        copy_arr[3] == 89 &&
        copy_arr[4] == 88) {
        cout << "OK" << endl;
    }
    else {
        cout << "BAD" << endl;
    }
}

void show_arr(int size, int* arr) {
    for (int k = 0; k < size; k++) {
        cout << arr[k] << " ";
    }
    cout << endl;
}

template <typename T>
void my_swap(T& x, T& y) {
    T temp = x;
    x = y;
    y = temp;
}

void task_copy_invert() {
    int arr[]{ 1,2,4,1,4,3,5,6,2,3,4 };
    int copy[size(arr)];
    copy_invert(size(arr), arr, copy);
    show_arr(size(arr), arr);
    show_arr(size(arr), copy);
    int temp = copy[0];
    copy[0] = copy[1];
    copy[1] = temp;
    show_arr(size(arr), copy);
}

int main() {
    //test_copy_invert();
    //task_copy_invert();

    int x = 3, y = 4;
    cout << "x: " << x << " y: " << y << endl;
    my_swap(x, y);
    cout << "x: " << x << " y: " << y << endl;

    double w = 55.6, v = 23.12;
    cout << "w: " << w << " v: " << v << endl;
    my_swap(w, v);
    cout << "w: " << w << " v: " << v << endl;

    char ch1 = 'f', ch2 = 'a';
    cout << "ch1: " << ch1 << " ch2: " << ch2 << endl;
    my_swap(ch1, ch2);
    cout << "ch1: " << ch1 << " ch2: " << ch2 << endl;

    //task_hello();
    /*
    cout << glob_sad << endl;

    glob_sad++;
    glob_sad = glob_sad;

    cout << sum(1, 2, 3) << endl;
    cout << sum(1, 2) << endl;
    cout << sum(1, 2, 0) << endl;

    my_fun();
    */
    return 0;
}