#include<iostream>
using namespace std;
class Animal {

   public:
    void eat() {
        cout << "I can eat!" << endl;
    }

    void sleep() {
        cout << "I can sleep!" << endl;
    }
};
// derived class
class Dog : public Animal {
 
   public:
    void bark() {
        cout << "I can bark!" << endl;
    }
};

int main() {
     Dog dog1;                      // Create object of the Dog class
   // Calling members of the base class
    dog1.eat();
    dog1.sleep();

    // Calling member of the derived class
    dog1.bark();

    return 0;
}
    

 
#include<iostream>
using namespace std;
class Base
{
public:
void show1()
{
cout<<" This is show function of first base class" << endl;
}
};
class Base2
{
public:
void show2()
{
cout<<" This is show function of second base class" << endl;
}
};
class derived: public Base1,public Base2
{
public:
void show3()
{
cout<<" This is show function of the derived class" << endl;
}
};
int main()
{
derived d;
d.show1();
d.show2();
d.show3();
return 0;
}
    

 
#include<iostream>
using namespace std;
// base class
class Animal {
   public:
    void info()
    {
        cout << "I am an animal." << endl;
    }
};

// derived class 1
class Dog : public Animal {
   public:
    void bark()
   {
        cout << "I am a Dog" << endl;
    }
};

// derived class 2
class Cat : public Animal {
   public:
    void meow()
   {
        cout << "I am a Cat." << endl;
    }
};

int main()
     {
    Dog dog1;

    dog1.info();  
    dog1.bark();
    
    Cat cat1;
    
    cat1.info();  
    cat1.meow();

    return 0;
}
    

 
#include<iostream>
using namespace std;
class Vehicle
{
  public:
    void Vehicle()
    {
      cout << "This is a Vehicle" << endl;
    }
};
 
class fourWheeler: public Vehicle
{  
   public:
   void fourWheeler()
    {
      cout<<" Objects with 4 wheels are vehicles" << endl;
    }
};

class Car: public fourWheeler{
   public:
    void Car()
     {
       cout<<"Car has 4 Wheels" << endl;
     }
};
 
int main()
{  
    Car obj;
    obj.Vehicle();
    obj.fourWheeler();
    obj.Car();
    return 0;
}
					  

 
#include<iostream>
using namespace std;
class a
{
public:
void show()
{
cout<< "This is class A.";
}
};
class b: virtual public a
{

};
class c: virtual public a
{

};
class d:  public b , public c
{

};

int main()
{  
   d obj;
   obj.show();
    return 0;
}