Re: Function calls to dynamically allocated matrices

From:
Mathias Gaunard <loufoque@gmail.com>
Newsgroups:
comp.lang.c++.moderated
Date:
Wed, 12 Nov 2008 07:13:37 CST
Message-ID:
<58d92175-69f8-449c-ac41-a79383743939@r36g2000prf.googlegroups.com>
On 12 nov, 08:03, Rob <rgalb...@comcast.net> wrote:

template<class T> class Matrix {
  [...]
  private:
    std::vector<std::vector<T> > data_;
  };


A fairly poor implementation.
A single vector would be a better idea.

Within main, there is no difficulty manipulating array A. I'm having
problems setting up a function prototype and call that allow A to be
manipulated within the function and returned to main as A.

Function prototype:
int* FORM(int A(int x, int y));

{ Note: this declares the parameter A as a function type. -mod/sk }

Create array A:
Matrix<int>A(x, y);

Function call within main:
A = FORM( A(x, y) ); ERROR: error C2664: 'FORM' : cannot convert
parameter 1 from 'int' to 'int (__cdecl *)(int,int)'


Matrix<int> form(const matrix<int>& a);

Matrix<int> a(x, y);
a = form(a);

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