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/Abstract Class in CPP C++/CPP Tutorial./

An abstract class is a class that is made to be specifically used as a base class. An abstract class contains at least one pure virtual function. You declare a pure virtual function by using a pure specifier (= 0) in the declaration of a virtual member function in the class declaration.

See this example of an abstract class:

class XY

{
public:
virtual void f() = 0;
};

Function XY::f is a pure virtual function.

NOTE: A function declaration cannot have both a pure specifier and a definition.

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/*Abstract Class in CPP C++/CPP Tutorial.*/

/Abstract Class in CPP C++/CPP Tutorial./