Dynamc Memory

I need to declare a bidimensional arrey but using dynamic memory. (C++)

I used:

int x,y;
cin>>x;
cin>>y;
int **m=new[x][y];

ERROR: Parse error before '['

I also used:

int **m= new int[x][y];

ERROR: Assigment to 'int **' from 'int (*)[((y-1)+1)]'

please help me...

Well, what you're REALLY doing is making an array of arrays.

So, do this:

Code:

---

int ** m;
m = new int * [x];
for (int i = 0; i < x; i++){
        m[i] = new int[y];
}

//Now, you can use the array.

//To deallocate, deallocate in reverse order you allocated:

for (int i = 0; i < x; i++){
        delete[] m[i];
}
delete[] m;

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Thnks a lot you've saved my life...

Not as eloquent as the first but a bit more efficient.

Code:

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#include "stdafx.h"
#include <iostream>
using namespace std;

int main(int argc, char* argv[])
{
        int x, y;
        cout << "Enter number of arrays: " << flush;
        cin >> x;
       
        cout << "Enter the number in each array : " << flush;
        cin >> y;

        int * pArry = new int[ x * y ];

        if( !pArry )
                throw bad_alloc( );

        for ( int i = 0; i < x; i++ )
        {
                for( int j = 0; j < y; j++ )
                {
                        (pArry + i)[ j ] = j + i;
                }
        }


        for ( i = x - 1; 0 <= i; i-- )
        {
                for( int j = y - 1; 0 <= j; j-- )
                {
                        cout << "  j = " << j << "  i = " << i << "  j + i  =  pArry[i][j] = " << (pArry + i )[ j ] << endl;
                }
        }

        delete pArry[];

        return 0;
}

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