matrix 1.2

#include <iostream>
using namespace std;

void change(int **matrix, int n, int i, int j) {
    for (int k = 0; k < n; k++) {
        int temp = matrix[k][i];
        matrix[k][i] = matrix[k][j];
        matrix[k][j] = temp;
    }
}

int main() {
    int n, m;
    cin >> n >> m;

    int **matrix = new int*[n];
    for (int i = 0; i < n; i++) {
        matrix[i] = new int[m];
    }

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            matrix[i][j] = rand() % 100;
        }
    }
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            cout << matrix[i][j] << " ";
        }
        cout << endl;
    }
    int i, j;
    cin >> i >> j;

    change(matrix, n, i, j);


    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            cout << matrix[i][j] << " ";
        }
        cout << endl;
    }

    for (int i = 0; i < n; i++) {
        delete[] matrix[i];
    }
    delete[] matrix;

    return 0;
}