I want to know how to rotate this two dimensional array clockwise 90 degree

[SusBro]

Hello. I found this code on google and I didn't manage to find a way to get another output of 90 degree clockwise rotated array.
Could you please help me?

// DMA of 2D array in C++
#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
    int x = 3, y = 3;

    int **ptr = new int *[x];

    for(int i = 0; i<y; i++)
    {
        ptr[i] = new int[y];
    }
    srand(time(0));

    for(int j = 0; j<x; j++)
    {
        for(int k = 0; k<y; k++)
        {
            int a = rand()%10;
            ptr[j][k] = a;
            cout<<ptr[j][k]<<" ";
        }
        cout<<endl;
    }
}

[Schol-R-LEA]

The code doesn't do what you think it does. It generates a 3x3 array and then populates it with random values. Frankly, it isn't very good code in general, but the main problem is that it doesn't do what it claims to.