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Rerurning Matrices and pointers to them

 
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Rerurning Matrices and pointers to them
Quboid
post 2 Sep, 2007 - 05:59 PM
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hey all,

I am doing some homework here (for tomorrow) and the last few programs seem a bit tricky. I have the logic for the one i am doing now down already, however, it would require me returning a matrix from my function. I am not to keen on trying to return a matrix, instead i am looking at return a pointer to matrix created.

how do i declare the function in this case?, and how do i declare the matrix in question?

thanks a million
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Bench
post 3 Sep, 2007 - 03:20 AM
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Is this C or C++? What are you using to represent your matrix? an array?

If possible, don't return anything (except maybe a bool in C++, or an int in C to indicate success/failure). Arrays are generally passed by pointer by default

Assuming you declare your matrix as a 2D array something like this
int my_matrix[3][3]

You can modify your matrix directly just through the function parameter
bool do_something( int matr[3][3] )
- Despite appearances, matr here is actually a pointer. its type is int (*)[3] . Any operations on matr that you perform here will reflect directly on to your original matrix.

This post has been edited by Bench: 3 Sep, 2007 - 03:21 AM
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