Calling constructor of the base class of a derived class..

Hey all, I'm starting to use more OOP techniques in my programs (I used the basics at one point then stopped using it so I wouldn't confuse my teacher), but I can't remember a lot of the advanced inheritance techniques.

I've read up on most of it, but it was awhile ago and since I never used it, I never retained it.

Anyways, I'm writing a graphical app in SDL where each object on the screen is it's own class derived from the base class, Object. (Which I think could be made an abstract class or something? I can't remember!). The constructor of the Object class sets the screen on which the object is drawn.

How do I call it when I create derived objects?

Also, if someone could provide a link with a quick tutorial or refresher on inheritance, I'd appreciate it! (I can't remember anything about virtual functions, abstract?, contaiment, etc... and the book I have is very wordy)

doh!

if your base class is Object and class A inherits from Object, then creating an instance of A will automatically call the Object constructor followed by the A constructor. Destructors will run in the reverse order. hope that helps...

Quote:

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Originally posted by Perspective
if your base class is Object and class A inherits from Object, then creating an instance of A will automatically call the Object constructor followed by the A constructor. Destructors will run in the reverse order. hope that helps...

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But if the constructor of Object takes a value?

Is this what you want to do?

Code:

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class myderivedexception : public exception {
public:
    myderivedexception(const char* what_arg) : exception(what_arg) {}
};

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Quote:

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Originally posted by IfYouSaySo
Is this what you want to do?

Code:

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class myderivedexception : public exception {
public:
    myderivedexception(const char* what_arg) : exception(what_arg) {}
};

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it appears to be, thanks!