multy_dimension_array

#include <iostream>

using namespace std;

int gen_rand(int a, int b) {
    return rand() % (b + 1 - a) + a;
}

void gen_randarr(int size, int arr[], int a, int b) {
    for (int k = 0; k < size; k++) {
        int res = gen_rand(a, b);
        arr[k] = res;
    }
}


int calc_sum(int a, int b) {
    return a + b;
}

void question() {
    int res = calc_sum(4, 7); // res <-- 11
    int res2 = calc_sum(res, 12);

    cout << res << " " << res2 << endl;

    /*
    int a = 4, b = 7;
    int res = a + b;
    cout << res << endl;
    */
}

void test_memory() {
    int arr[]{ 1,2,3,4,5 };
    cout << arr[0] << endl;

    int val = 14;

    cout << arr << endl;
    cout << question << endl;
    cout << val << endl;
    cout << &val << endl;
}

void show_arr2d(int num_col, int num_row, int data[][3]) {
    for (int row = 0; row < num_row; row++) {
        for (int col = 0; col < num_col; col++) {
            cout << data[row][col] << " ";
        }
        cout << "\n";
    }
}


void test_array2d() {
    int matr[2][3]{
        {1,2,3},
        {4,5,6}
    };

    /*
        int matr[4][2][3]{
        {{1,2,3}, {4,5,6}},
        {{1,2,3}, {4,5,6}},
        {{1,2,3}, {4,5,6}},
        {{1,2,3}, {4,5,6}}
    };

    */

    cout << matr[0][1] << endl;

    show_arr2d(3, 2, matr);

    matr[1][0] = 9;

    for (int row = 0; row < 2; row++) {
        for (int col = 0; col < 3; col++) {
            cout << matr[row][col] << " ";
        }
        cout << "\n";
    }
}

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

void join_arr() {
    const int n = 5;
    int a[n]{ 1,2,3,4,5 };
    int b[n]{ 5,4,3,2,1 };
    int c[2 * n];

    for (int k = 0; k < n; k++) {
        /*
        c[k] = a[k];
        c[k+n] = b[k];
        */
        c[2*k] = a[k];
        c[2*k + 1] = b[k];
    }
    show_arr(2 * n, c);
}

void rotate_arr() {
    const int n = 5;
    int arr[n]{1,2,3,4,5};
    show_arr(n, arr);

    int tmp = arr[0];
    for (int k = 1; k < n; k++) {
        arr[k - 1] = arr[k];
    }
    arr[n - 1] = tmp;

    show_arr(n, arr);
}

int main() {

    cout << "Hello" << endl;
    //join_arr();
    rotate_arr();
    //test_array2d();
    return 0;
}