Hi, I'm making a matrix class and I'm currently trying to overload some operators.

+=

```
#ifndef MATRIX_H
#define MATRIX_H
#include <iostream>
#include <ostream>
#include <string>
#include <sstream>
class Matrix
{
Matrix& operator = (const Matrix &m);
Matrix& operator += (const Matrix &m);
public:
Matrix(int x, int y);
Matrix(Matrix &m);
~Matrix();
void Init();
void Display() const;
int get_x() const;
int get_y() const;
const int * const get_p() const;
private:
bool isInitialized;
int x, y;
int *p; // pointer to the matrix
};
#endif // MATRIX_H
```

```
Matrix& Matrix::operator +=(const Matrix &m)
{
if(x == m.get_x() && y == m.get_y())
{
for(int i = 0; i < x; ++i)
for(int j = 0; j < y; ++j)
*(p + (i * y) + j) = *(m.get_p() + (i * y) + j);
}
return *this;
}
```

and in main:

```
#include <iostream>
#include "matrix.h"
using std::cout; using std::cin;
int main()
{
Matrix a(2, 2); a.Init();
Matrix b(2, 2); b.Init();
b += a;
b.Display();
system("pause");
return 0;
}
```

and I get:

1>c:\users\user\documents\visual studio 2008\projects\matrices\matrices\main.cpp(12) : error C2248: 'Matrix::operator +=' : **cannot access private member declared in class 'Matrix'**

1> c:\users\user\documents\visual studio 2008\projects\matrices\matrices\matrix.h(13) : see declaration of 'Matrix::operator +='

1> c:\users\user\documents\visual studio 2008\projects\matrices\matrices\matrix.h(10) : see declaration of 'Matrix'

1>Build log was saved at "file://c:\Users\User\Documents\Visual Studio 2008\Projects\Matrices\Matrices\Debug\BuildLog.htm"

I'm not trying to access a private member, am I? And it should be working as well,because I'm doing it from inside the class. Something else is Wrong I think.