What is pure virtual function in C++? tccicomputercoaching.com

A pure virtual function in C++ is like an "abstract method" in other languages -- it forces insatiable subclasses to provide an implementation of the method.

A pure virtual method is an abstract method with no implementation that must be implemented by all subclasses of the owner class. It also refer that the owner class is an abstract class and one can't instantiate an object of it.

class base
{
virtual void show()=0; // pure virtual function
};
class derived : public base
{
void show()
{
cout<<"child class implement pure virtual function";
}
};
void main()
{
derived d;
d.show();
getch();
}

Output: class implement pure virtual function

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