найти новую матрицу (программа)

#include <iostream>
#include <ctime> 
#include <cmath>
 
using std::cout;
using std::cin;
using std::endl;

int sr_geo(int **arr, int n)
{
        int sr_geo=0; 
        float pr=1;
        for(int i=0; i<n; i++)
        {
                for(int j=0; j<n; j++)
                {
                        if(i==j)
                        {
                                pr*=abs(arr[i][j]);
                        }
                }
        }
        sr_geo = (int)exp(log((float)pr)/n);
        return sr_geo; 
}
 
int main()
{    
         srand((unsigned)time(NULL)); 
         int n,i,j;
         int sr;
         int **arr;
         cout<<"Vvedite razmer massiva: ";
         cin>>n;
         arr = new int*[n];
         cout<<"Massiv: "<<endl;
         for(i=0; i<n; i++)
         {
                  arr[i] = new int[n];
                  for(j=0; j<n; j++)
                   {
                     arr[i][j]=rand()%9+1;
                     cout<<arr[i][j]<<"  ";
                        }
            cout<<endl;
         }
         sr = sr_geo(arr,n); 
         cout<<endl;
         cout<<"Sformirovannaya matrica:"<<endl;
         for(i=0; i<n; i++)
         {
                 for(j=0; j<n; j++)
                 {
                         if((i+j)%2==0)
                         {
                                 arr[i][j]= sr;
                         }
                         cout<<arr[i][j]<<"  ";
                 }
                 cout<<endl;
         }
 
         delete arr;
         system("pause");
   return 0;
}