Interschimbare coloane matrice cu conditie

#include <iostream>
using namespace std;

void afisare(int matrice[50][50], int n, int m)
{
    cout << "Afisare matrice: " << endl;
    for (int i = 0; i < n; i++) // linii
    {
        for (int j = 0; j < m; j++) // coloane
        {
            cout << matrice[i][j] << " ";
        }
        cout << endl;
    }
}


int main()
{
    int n, m; // linii, coloane

    cout << "n [2,50] = "; cin >> n;
    cout << "m [2,50] = "; cin >> m;

    if (n < 2 || n > 50 || m < 2 || m > 50)
    {
        cout << "Nu ai respectat intervalele.";
        return -1;
    }

    int matrice[50][50];

    // Populare matrice
    for (int i = 0; i < n; i++) // linii
    {
        for (int j = 0; j < m; j++) // coloane
        {
            cout << "Introdu o valoare cuprinsa intre: [0, 10000]!" << endl;
            cout << "matrice[" << i << "][" << j << "] = ";
            cin >> matrice[i][j];

            // Check interval
            if (matrice[i][j] < 0 || matrice[i][j] > 10000)
            {
                cout << "Nu ai respectat intervalul!" << endl;
                return -1;
            }
        }
    }

    afisare(matrice, n, m);

    int valMin = matrice[0][0], valMax = matrice[0][0];
    int coloanaMin = 0, coloanaMax = 0;

    // Cautare valoare minima si maxima in matrice
    for (int i = 0; i < n; i++) // linii
    {
        for (int j = 0; j < m; j++) // coloane
        {
            if (matrice[i][j] < valMin)
            {
                valMin = matrice[i][j];
                coloanaMin = j;
            }

            if (matrice[i][j] > valMax)
            {
                valMax = matrice[i][j];
                coloanaMax = j;
            }
        }
    }


    // Interschimbare coloana minima cu coloana maxima
    for (int i = 0; i < n; i++) // linii
    {
        int aux = matrice[i][coloanaMin];
        matrice[i][coloanaMin] = matrice[i][coloanaMax];
        matrice[i][coloanaMax] = aux;
    }

    afisare(matrice, n, m);


    return 0;
}