Qfyilyi

I am trying to delete last row and the last column of a 2d array. I created this method for this purpose.

void deleteLastRowColumn(int **A, int row, int column)

{

    int **temp = A;

    A = new int *[row - 1];

    for (int i = 0; i < row - 1; i++)

    {

        A[i] = new int[column - 1];

        for (int j = 0; j < column - 1; j++)

        {

            A[i][j] = temp[i][j];

        }

        delete temp[i];

    }

}

and printing the result with

void printArray(int **a, int row, int column)

{

    for (int i = 0; i < row; i++)

    {

        for (int j = 0; j < column; j++)

        {

            cout << a[i][j] << "   ";

        }

        cout << endl;

    }

}

And my main method creates a 5x5 array

int main()

{

    int **a;

    a = new int *[5];

    for (int i = 0; i < 5; i++)

        a[i] = new int[5];

    for(int i = 0; i < 5; i++)

    {

        for(int j = 0; j < 5; j++)

        {

            a[i][j] = (i*5) + j + 1;

        }

    }

    printArray(a, 5, 5);

    cout << "nnnn";

    deleteLastRowColumn(a,5,5);

    printArray(a,4,4);

}

The output didn't make sense to me:

1   2   3   4   5   

6   7   8   9   10   

11   12   13   14   15   

16   17   18   19   20   

21   22   23   24   25   









6   7   8   9   

11   12   13   14   

16   17   18   19   

0   0   18   19 

I expected it to remove last column and last row but something different happened. If you can explain me what's wrong here that would be great!

Thank you.