class_virtual

#include<bits/stdc++.h>
using namespace std;
class base
{
    int b;
public:
    base(){}
    base(int b)
    {
        this->b=b;
        cout<<"Inside base having "<<this->b<<endl;
    }
};
class base2
{
    int bb;
public:
    base2(){}
    base2(int bb)
    {
        this->bb=bb;
        cout<<"Inside base_2 having "<<this->bb<<endl;
    }
    virtual void print_data(int x)=0;
};
class der1:virtual public base,public base2
{
    int d;
public:
    der1(){}
    der1(int c,int d):base(c)
    {
        this->d=d;
        cout<<"Inside derieved_A having "<<this->d<<endl;
    }
    void print_data(int x)
    {
        cout<<"Inside pure virtual function in derieved_A from abstract base_2 having "<<x<<endl;
    }
};
class der2:public base
{
    int e;
public:
    der2(){}
    der2(int e,int f):base(f)
    {
        this->e=e;
        cout<<"Inside derieved_B having "<<this->e<<endl;
    }
};
class der3:public der1,public der2
{
    int a;
public:
    der3(){}
    der3(int a,int b,int c,int d,int e):der1(b,c),der2(d,e)
    {
        this->a=a;
        cout<<"Inside derieved_C having "<<this->a<<endl;
    }
};
int main()
{
    der3 obj(5,6,7,8,9);
    base2 *ptr;
    der1 ob2;
    ptr=&ob2;
    ptr->print_data(250);
}