I have 2 programs. Why EX1 is correct but EX 2 is not?
======EX 1=======
======EX 2======Code:class Base{ public: void foo() const{ } }; class Derived: public Base{ public: int foo() const{ return 1; } };
Code:class Base{ public: virtual void foo() const{ } }; class Derived: public Base{ public: int foo() const{ return 1; } };