Classes across multiple files.

[bosox99]

Could someone give me a short and simple examples of putting classes in mutiple files?

class ProgramFun
{

//Generic function i want in a different file, but still in the class
};

[vlad from moscow]

Usually a class definition is placed in a header file while its member functions' definitions are placed in a .cpp module if they were not defined in the class definition (that is they were only declared in the class definition).

[TheIdeasMan]

Normally you put the class declaration (your code above) into a ProgramFun.h header file, then the definition of the class functions into a ProgramFun.cpp file. Then in a .cpp file that uses the class (whether it be the .cpp file that has main() in it, or some other file), you #include ProgramFun.h.

In the ProgramFun.cpp you need to use the scope resolution operator ::, like this:

ProgramFun::ProgramFun() {  //default constructor
//your code here
}

ProgramFun::ProgramFun(int arg1, int arg2) {  //another constructor
//your code here
}

ProgramFun::~ProgramFun() {  //default destructor
//your code here
}

ProgramFun::MyFunction(int Arg1, double Arg2) {

//your code here
}

Don't be tempted to provide get / set functions for each private member variable, better to think about how things happen in the real world - provide functions that reflect that.

Hope all goes well.

[TheIdeasMan]

I forgot to say that If you use an IDE, you should be able to use a class wizard, which will create the appropriate files, and stubs for the functions. IF you create a new function, you can get it to create a stub for it in the .cpp file. There are also handy things for when there is inheritance.

HTH

[bosox99]

Aha! I got it, thanks for the help.