12th D Prog-7 Inheritance Programming;

//7A C++ program to explain // Multiple inheritance #include <iostream.h> // first base class class Vehicle {   public:     Vehicle()     {       cout << "This is a Vehicle" << endl;     } }; // second base class class FourWheeler {   public:     FourWheeler()     {       cout << "This is a 4 wheeler Vehicle" << endl;     } }; // sub class derived from two base classes class Car: public Vehicle, public FourWheeler { }; // main function int main() {       // creating object of sub class will     // invoke the constructor of base classes     Car obj; } Output: This is a Vehicle This is a 4 wheeler Vehicle //7B C++ program to implement // Multilevel Inheritance #include <iostream.h> // base class class Vehicle {   public:     Vehicle()     {       cout << "This is a Vehicle" << endl;     } }; class fourWheeler: public Vehicle {  public:     fourWheeler()     {       cout<<"Objects with 4 wheels are vehicles"<<endl;     } }; // sub class derived from two base classes class Car: public fourWheeler{    public:      car()      {        cout<<"Car has 4 Wheels"<<endl;      } }; // main function int main() {       //creating object of sub class will     //invoke the constructor of base classes     Car obj;      } //7C C++ program to implement // Hierarchical Inheritance #include <iostream.h> // base class class Vehicle {   public:     Vehicle()     {       cout << "This is a Vehicle" << endl;     } }; // first sub class class Car: public Vehicle { }; // second sub class class Bus: public Vehicle {       }; // main function int main() {       // creating object of sub class will     // invoke the constructor of base class     Car obj1;     Bus obj2; } Output: This is a Vehicle This is a Vehicle