C++ question

ofer4 · 06-02-2012, 01:46 AM

Quote:

Originally Posted by johnsfine

The basics of what you should do are shown here:

Code:

class Mat
{
public:
    Mat(int rows, int Cols);
};


class teacher
{
    Mat m_mat1;
    Mat m_mat2;
public:
    teacher( int r1, int c1, int r2, int c2 ) :
        m_mat1(r1, c1),
        m_mat1(r2, c2)
    {}
};

The two Mat objects are members of teacher rather than base classes.

In post #7, I showed a way to make Mat be a base class of teacher twice (by disguising Mat with a numbered template wrapper struct). If there were some good reason to want Mat as two base classes of teacher rather than as two members, then this shows you it is possible. If you try to work with the starting point from post #7, you could make it work, but I don't think any aspect of that would have advantages vs. the simpler approach shown in this post.

thanks alot

i have one more question

if for mat2 i want to create a new methods (dont want to use the inherited methods)

and for mat1 i want to use the inherited methods.

how can i implement it?

thanks

414N · 06-02-2012, 02:30 AM

Quote:

Originally Posted by ofer4

thanks alot

i have one more question

if for mat2 i want to create a new methods (dont want to use the inherited methods)

and for mat1 i want to use the inherited methods.

how can i implement it?

thanks

I think you still haven't got it... There's no inheritance in the code snippet you quoted and you can't create new operations/methods only for a specific instance (mat2) without affecting the Mat class definition (therefore, all instances will be affected).
You should really try to better explain what you'd want to achieve so we can help you better.