Virtual Base Class Example

#include <iostream>

using namespace std;

class A
{
public:
A()
{
cout << "A Class" << endl;
}
};

class B :virtual public A
{
public:
B()
{
cout << "B Class" << endl;
}
};

class C : virtual public A
{
public:
C()
{

cout << "C Class" << endl;

}
};

class D : public B,public C
{
public:
D()
{
cout << "D Class" << endl;
}
};

int main()

{

 D d;

return 0;

}

Output

A Class
B Class
C Class
D Class

Multiple Inheritance Example

#include <iostream>
using namespace std;

class A
{
public:
A()
{
cout << "A class constructor" << endl;
}
};

class B : public A
{
public:
B()
{
cout << "B class constructor" << endl ;
}
};

class C : public B
{
public:
C()
{
cout << "C class constructor" << endl;
}
};


int main()
{
B b;
C c;
return 0;
}



Output:

A class constructor
B class constructor
A class constructor
B class constructor
C class constructor

Quote

You don't need a reason for doing everything in life,do it because you want to, because its fun because its make you really really happy.

                                                   Source : Unknown

C++ Basic Inheritance Example

#include <iostream>

using namespace std;

// Base Class

class Base

{

public:

// Base class constructor

Base()

{

cout << "Base Class" << endl;

}

};

// Derived Class

class Derived : public Base

{

public:

// Derived class constructor

Derived()

{

cout << "Derived Class" << endl;

}

};

int main()

{

Base b;         // Base class constructor called 

 Derived d;    // first Base class constructor called then derived class constructor

return 0;

}

output:

Base Class
Base Class
Derived Class