function header = 0

[Jay03]

virtual void empty() = 0; // fucntion header Why is this function header assigned a value of zero? Is this suppose to mean its a pure virtual function from a derived class with no implementation in it? like this: virtual void empty() { // empty } Thanks, Jay :confused:

[valikac]

definitely Kuphryn

[Jay03]

Which functions usually have an empty implementation.... is it the Base Class or the Derived Class?

[Alex_Y]

Base class CBase //abstract class { virtual int Pure(int nA) = 0; } class CDerive : public CBase { virtual Pure(int nA) { return nA+1; } }

:)

[markkuk]

Yes, it means it's a pure virtual function with no implementation. That's not the same as a function whose implementation has an empty body.