Weird error in Turbo C++ IDE - Class template related question - c++

Question

Basically I'm trying to compile a template class which is meant to represent a table for adding up polynomials. As a result of this the table needs to be nullable.
This is the sort of thing I am trying to represent http://www.mathsisfun.com/algebra/polynomials-adding-subtracting.html.
And this is the template which is meant to do it:
template <class T> class TableWithBlanks : public Table<T> {
public:
TableWithBlanks( const int width, const int height ) : w(width), h(height), table_contents( new t_node[width][height]
{
table_contents = new t_node[width][height];
// Go through all the values and blank them.
for( int i = 0; i < w; i++)
{
for( int a = 0; a < h; a++)
{
table_contents[i][a].value_ptr = NULL;
}
}
}
void set_value( const int width, const int height, const T* table_value_ptr)
{
if( width <= w && height <= h )
{
table_contents[w][h] = table_value_ptr;
}
}
T* get_value( const int width, const int height)
{
if( width <= w && height <= h )
{
return table_contents[width][height];
}
}
private:
typedef struct node {
T* value_ptr;
} t_node;
t_node** table_contents;
int w;
int h;
};
And this is the error I am getting:
[C++ Error] TableWithBlanks.h(16):
E2034 Cannot convert
'TableWithBlanks::node
( *)[1]' to
'TableWithBlanks::node
* *'
The PolynomialNode class is a class which is a linked list, where each node in the list represent the terms in a simple polynomial - I don't need to go into details.

Answer 1

In this line, you're trying to dynamically construct a two-dimensional array:
table_contents = new t_node[width][height];
but C++ doesn't work this way. For an example of how to allocate two-dimensional arrays, see this question, for example.