inherit.cpp

#include <iostream>
using namespace std;

class A1
{
    protected:
        int a1;
    public:
        A1(int val = 0){a1=val;};
        virtual void show(){cout<<"a1="<<a1<<endl;};
        virtual void print(){cout<<"class A1"<<endl;};
};

class B1: public A1
{
    protected:
        int b1;
    public:
        B1(int val_a1 = 0, int val_b1 = 0):A1(val_a1){b1=val_b1;};
        virtual void show(){cout<<"a1="<<a1<<" b1="<<b1<<endl;};
        virtual void print(){cout<<"class B1"<<endl;};
};

class C1: public B1
{
    protected:
        int c1;
    public:
        C1(int val_a1 = 0, int val_b1 = 0, int val_c1 = 0):B1(val_a1, val_b1){c1=val_c1;};
        virtual void show(){cout<<"a1="<<a1<<" b1="<<b1<<" c1="<<c1<<endl;};
        virtual void print(){cout<<"class C1"<<endl;};
};

class C2: public B1
{
    protected:
        int c2;
    public:
        C2(int val_a1 = 0, int val_b1 = 0, int val_c2 = 0):B1(val_a1, val_b1){c2=val_c2;};
        virtual void show(){cout<<"a1="<<a1<<" b1="<<b1<<" c2="<<c2<<endl;};
        virtual void print(){cout<<"class C2"<<endl;};
};

int main()
{
    C2 c2(-1,-2,-3);
    c2.print();
    c2.show();

    A1 * a = &c2;
    a->print();
    a->show();
}