#include <iostream>


using namespace std;


void print(int* arr, int size) {
    for (int i = 0; i < size; i++) {
        cout << *(arr + i) << " ";
    }
    cout << endl;
}

void init(int* arr, int size) {
    for (int i = 0; i < size; i++) {
        *(arr + i) = rand() % 100;
    }
}

void change(int* arr, int size) {
    for (int i = 0; i < size - 1; i += 2) {
        int temp = *(arr + i);
        *(arr + i) = *(arr + i + 1);
        *(arr + i + 1) = temp;
    }
}


int main() {
    setlocale(LC_ALL, "ru");

    srand(time(NULL));

    const int size = 10;

    int arr[size];

    init(arr, size);

    print(arr, size);

    change(arr, size);

    print(arr, size);


}