класс matrix

#include <iostream>
#include <cmath>

using namespace std;

class Matrix
{
  int **arr[100][100];
  public: int m, n;

   void sozdanie (int m, int n)
  {
    int **arr = new int*[n];
    for (int i = 0; i < n; i++)
      arr[i] = new int[n];

    for (int i = 0; i < n; i++)
      for (int j = 0; j < n; j++)
       arr[i][j] = 0;

    matrix(arr, n);
  }

 void matrix( int **arr, int n )
{
   for (int j=1; j<n; j++)
      arr[0][j]=j+1+arr[0][j-1];

   for (int i=1; i<n; i++)
    for (int j=0; j<n; j++)
     {
       if (j!=n-1)
     arr[i][j]=arr[i-1][j+1]-1;
     else arr[i][j]=arr[i-1][j]+n-i;
     }

  print (arr, n, n);
}

  void print (int **arr, int m, int n)
  {
    for (int i = 0; i < n; i++)
    {
      for (int j = 0; j < m; j++)
      {
        cout.width(3);
        cout << arr[i][j] << " ";
      }
     cout << endl;
    }
  }

};

int main()
{
  int x, y;
  cin >> x >> y;

  Matrix arr;
  arr.sozdanie(x, y);
}