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brad sue · Oct 27th, 2006, 1:10 AM

Quote:

Originally Posted by The Dark

If you want class Rectangle to be a friend class to Screen, put

friend class Rectangle;

inside screen.
You will need to tell the compiler that Rectangle is a class before you try use it as a friend. This is called forward declaring. Put

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class Rectangle;

before the Screen class declaration.

A better idea might be that the Rectangle class should be using the Screen class setPoint member function instead of jumping into the internals of the Screen class.

Also note that this line in setPoint

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        pixels[i][j]='c';

Is setting the pixel to the constant 'c', not the value of the c parameter.

Thanks Dark,
but when I put friend class rectangle in Screen, I get a linker error.
[Linker error] undefined reference to `Rectangle::~Rectangle()'
[Linker error] undefined reference to `Point::~Point()'
and the same error that before is not gone.