#include <iostream.h>

double** dyn_2d(int m, int n)
{  double* arr = new double[m*n];
   double** a = new double*[m];
   for ( int i=0 ; i < m ; i++ )
   {   a[i] = arr + i*n;
       for (int j=0 ; j < n ; j++ )
           a[i][j] = 0.0;
   }
   return(a);
}
void dyn_2d(double** a)
{    delete [] *a;     // free data cells
     delete []  a;     // free pointers cells
}


int main()
{  double** mya = dyn_2d(3,5);
   for ( int i=0 ; i < 3 ; i++ )
   {   for (int j=0 ; j < 5 ; j++ )
       {   mya[i][j] = 1.0/(i*5+j+1);
           cout << mya[i][j] << "  ";
       }
       cout << endl;
   }
   dyn_2d(mya);
   return(0);
}