lesson17_321

#include <iostream>

using namespace std;

int get_max(int size, int arr[]);

void get_max_arr(int size,
    int arr1[],
    int arr2[],
    int arr_res[]);

int get_idmax(int size, int arr[]);

int get_idval(int size, int arr[], int val);

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

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

void gen_arr(int size, int arr[]) {
    for (int k = 0; k < size; k++)
        arr[k] = get_rand(-10, 10);
}

void task0() {
    const int size = 10;
    int vects[size];
    gen_arr(size, vects);
    show_arr(size, vects);
    int id = 3;
    cout << vects[id] << " "    // значение
        << id << " "            // индекс
        << &(vects[id])         // адрес VRAM
        << endl;

    cout << "max: " << get_max(size, vects) << endl;

    int vects2[size], max_vects[size];
    gen_arr(size, vects2);
    vects2[3] = 100;

    get_max_arr(size, vects, vects2, max_vects);

    show_arr(size, vects2);
    show_arr(size, max_vects);

    int id_max = get_idmax(size, vects);
    cout << id_max << " "
        << vects[id_max] << endl;

    cout << "find -4 in :" << get_idval(size, vects, -4) << endl;
}

int get_idmax(int size, int arr[]) {
    int max = arr[0];
    int id_max = 0;

    for (int k = 1; k < size; k++) {
        if (arr[k] > max) {
            max = arr[k];
            id_max = k;
        }
    }
    //cout << max << endl;
    return id_max;
}

int get_idval(int size, int arr[], int val) {
    for (int k = 0; k < size; k++) {
        if (val == arr[k]) {
            return k;
        }
    }
    return -1;
}

void test_swap_cpu() {
    int a = 3, b = 7;
    a = a + b;
    b = a - b;
    a = a - b;
    cout << a << " " << b << endl;
}

void test_swap_ram() {
    int a = 3, b = 7;
    int temp = b;
    b = a;
    a = temp;
    cout << a << " " << b << endl;
}

int get_max(int size, int arr[]) {
    int max = arr[0];

    for (int k = 1; k < size; k++) {
        if (arr[k] > max) {
            max = arr[k];
        }
    }
    //cout << max << endl;
    return max;
}

void get_max_arr(int size,
                 int arr1[],
                 int arr2[],
                 int arr_res[])
{
    for (int k = 0; k < size; k++) {
        arr_res[k] = (arr1[k] > arr2[k]) ? arr1[k] : arr2[k];
        /*
        if (arr1[k] > arr2[k])
            arr_res[k] = arr1[k];
        else
            arr_res[k] = arr2[k];
        */
    }
}

int main() {
    srand(int(time(NULL)));
    task0();
    test_swap_ram();
    test_swap_cpu();

    return 0;
}