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Is there any way I can include a file in a class so it can use it but not allow anything including that class into the scope to be able to use it? To simplify lets say I have the iostream header in a class called IO and I make IO be able to write things with the cout function but not let anything that includes IO to be able to use anything in the iostream header. That’s not what I want to do but I need to figure this out so I don’t “double define” things.
A common solution to that problem is to declare IO in a separate header/source file pair. In the header you forward declare the classes you will be needing and in the source file you include the header you need. This way the actual contents of the header are only accessible in the source file.