struct inheritance, polymorphism in c++

gistfile1.cpp

#include <iostream>
using namespace std;
struct CommonBase
{
    public:
        CommonBase();
        CommonBase(int);
        virtual ~CommonBase();

        int getC(){return c;}
        void setC(int c){this->c = c;}
        void pubPrint(){print();}
    private:
        int c;
    protected:
        virtual void print(){cout << "CommonBase: " << c << endl;}
};

struct A : virtual public CommonBase
{
    private:
        int a;
    public:
        A();
        ~A();
    void pubPrint(){print();}
        int getA(){return a;}
        void setA(int a){this->a = a;}
    protected:
        virtual void print();
};
A::A() : a(20)
{}
void A::print()
{
    cout << "A: " << a << endl;
    cout << "CommonBase: " << getC() << endl;
}
A::~A()
{
    cout << "Destructor: A - 2" << endl;
}
CommonBase::~CommonBase()
{
    cout << "Destructor: CommonBase - 1" << endl;
}
CommonBase::CommonBase() : c(-1)
{}

CommonBase::CommonBase(int C) : c(C)
{}

int main()
{
    CommonBase *cb = new CommonBase(10);
    cb->pubPrint();
    
    cout << endl;
    A *a = new A();
    a->pubPrint();
    
    cout << endl;
    CommonBase *acb = new A();
    a->pubPrint();
    
    cout << endl;
    delete cb;
    
    cout << endl;
    delete a;
    
    cout << endl;
    delete acb;
    return 0;
}

test.py

print("test")

run at http://codepad.org/liNMG3KD