使用 C++ 控制台应用程序中内置的类的 MFC 编译错误

Question

I am trying to build a fractal application in MFC using code that I have written in a C++ console application. I have a created all the same classes in the MFC application and I clicked build (I wasn't expecting it to work)

Anyway it complains a lot about the RGB.h class and the RGB.cpp class.
Do I need to change something in the configuration of the project?

If I build the console application it works fine, but clearly there are differences when trying to use the classes in an MFC application.

Just wanted to know if there is anything I can do about these two errors as I'm not sure where to start with them.

RGB.cpp

compiler error: expected a ;

RGB::RGB(double r, double g, double b) : r(r), g(g), b(b) {}

RGB.h

Error C2143 syntax error: missing ')' before '|'

RGB(double r, double g, double b);

Answer 1

There is no issue with the code posted as such. But RGB is a macro, declared in wingdi.h, that gets pulled in when including Windows.h. It is defined like this:

#define RGB(r,g,b) ((COLORREF)(((BYTE)(r)|((WORD)((BYTE)(g))<<8))|(((DWORD)(BYTE)(b))<<16)))

This preprocessor macro clashes with the symbol used for the type. It's easiest to use a different symbol for the type, eg rgb .