int operator == (const XXXMatrix& src)
Example: if (A == B) ...
Return TRUE if the two matrices have the same dimensions and every entry in A is equal to the corresponding entry in B. Return FALSE otherwise.
int operator != (const XXXMatrix& src)
Example: if (A != B) ...
Return TRUE if the two matrices have different dimensions or if any entry of A differs from the corresponding entry in B. Return FALSE otherwise.