Overriding vs Virtual
- by anonymous
What is the purpose of using the reserved word virtual in front of functions? If I want a child class to override a parent function, I just declare the same function such as "void draw(){}".
class Parent{ public: void say(){ std::cout << "1"; }};
class Child : public Parent{public:void say(){ std::cout << "2"; } };
int main()
{
Child* a = new Child();
a->say();
return 0;
}
The output is 2.
So again, why would the reserved word "virtual" be necessary in the header of say() ?
Thanks a bunch.
