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wizard341

Inheritance question

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Quick question regarding inheritance here... If I have 2 classes class Foo1 { public: int FooData; } class Foo2 { public: int FooData2; } and another one that inherits from both class DerivedFoo : public Foo1, public Foo2 { public: int FooData; DerivedFoo() : FooData(5) {} } what exactly is the statement DerivedFoo() : FooData(5) {} doing? My guess is that DerivedFoo is setting it's own variable (FooData) to 5. My buddy says that since FooData is public in Foo1, that it essentially makes those 2 variables the same. What are your guys' thoughts? Thanks!

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Well, you can't use constructor initializer lists to initialize parent variables, only variables in that class, it would use the DerivedFoo variable. If you were setting the value in the actual body of the constructer I would guess it would still use the child version, though I don't know if that is standardized somewhere.

I would just avoid re-using variable names.

If you remove int FooData; from DerivedFoo, it will generate a compiler error.

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