Re: base classes and inheritance problem

#include <iostream>
using namespace std;

class A
{
    public:
    A(){n=5;}
    virtual void show() = 0;

    protected:
        int n;
};

class B : public A
{
    public:
    void show(){cout << n << endl;}
};

class C : public A
{
    public:
    void show(){cout << n*2 << endl;}
};

int main()
{
    A *c;
    int class_num = 0; //user input

    if(class_num == 0){
        c = new B();
    }else{
        c = new C();
    }

    c->show();

    delete c;
    return 0;
}

Considering this example, what would be the best way if i wanted to
avoid virtual functions? of course i've reconsidered the use of
virtual functions since it may be totally unneeded optimization to
avoid them, but im just curious about this right now, and yes you are
right im not very used to C++ i mainly use it as an "extended" C.