C++ help (Newbie)

what are the errors?

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Another question I have is about syntax. Is: class foo : public bar {} the same as: class bar; class foo{} //uses stuff from bar

no

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Original post by Player_0 If gl.h is included twice does that produce the error?

No.

Read this.

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Original post by Player_0 Is: class foo : public bar {} the same as: class bar; class foo{} //uses stuff from bar Thanks for any help and corrections anywhere.

No. The latter will not compile unless foo has its own set of stuff with the same names as the stuff it "uses from bar", and in that case it will not actually use the stuff from bar, but its own.

Unless you meant that foo objects are using stuff from bar objects; i.e. the foos either contain an actual bar object (or pointer thereto) in their data or receive them as parameters. In which case the behaviour is still different: in the former case you assert that a foo is-a bar; in the latter, that it has-a bar (or even more weakly, simply talks to bars.)

Under windows you must always #include before you #include . This is probably the source of your errors in gl.h.

Enigma