Row = Column(dinamic+static mas)

#include <iostream>
#include<iomanip>
#include<ctime>
using namespace std;
void main()
{
    srand(time(NULL));
    //const int n = 20;
    long int n = rand() % 5000;
    int **mas = new int*[n];
    int k = rand() % n;
    //int mas[n][n];
    for (int i = 0; i < n; i++)
    {
        mas[i] = new int[n];
        for (int j = 0; j < n; j++)
            mas[i][j] = rand() % 2000 - 100;
    }
    cout << "Source array:" << endl;
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < n; j++)
            cout << setw(4) << mas[i][j];
        cout << endl;
    }
    //cout << "Enter number of column:";
    //cin >> k;
    for (int i = 0; i<n; i++)
        for (int j = 0; j < n; j++) {
            if (i == k) mas[i][j] = mas[j][k];
            else
            {
                mas[i][j] = mas[i][j];
            }
        }
    cout << "Result array:" << endl;
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < n; j++)
            cout << setw(4) << mas[i][j];
        cout << endl;
    }
    for (int i = 0; i < n; i++) {
        delete[]mas[i];
    }
    delete[]mas;
    system("pause");
}