void Resize(int arr[], int newSize)
{
    if(arr != NULL )
        delete[] arr;

    arr = new int[newSize]();

}

int _tmain(int argc, _TCHAR* argv[])
{
    const int InitialSize = 5, NewSize = 10;

    //Initialize Array
    int *arr = NULL;
    arr = new int[InitialSize]();

    //Resize arr to new Size
    Resize(arr, NewSize);

    //Assign Values for new array here
    for(int i = 0;i < NewSize; i++)
    {
        arr[i] = i;
    }

    //Free Memory
    if(arr)
    {
        delete[] arr;
    }

    return 0;
}