Exercise -4 (Inheritance):

a) Write C++ Programs and incorporating various forms of Inheritance

i) Single Inheritance

ii) Hierarchical Inheritance

iii) Multiple Inheritances

iv) Multi-level inheritance

v) Hybrid inheritance

b) Also illustrate the order of execution of constructors and destructors in inheritance

i) Single Inheritance

#include<iostream>
using namespace std;

class AddData          //Base Class
{
        protected:
                int num1, num2;
        public:
                void accept()
                {
                        cout<<"\n Enter First Number : ";
                        cin>>num1;
                        cout<<"\n Enter Second Number : ";
                        cin>>num2;
                }
};
class Addition: public AddData   //Class Addition – Derived Class
{
                int sum;
        public:
                void add()
                {
                        sum = num1 + num2;
                }
                void display()
                {
                        cout<<"\n Addition of Two Numbers : "<<sum;
                }
};
int main()
{
        Addition a;
        a.accept();
        a.add();
        a.display();
        return 0;
}

Output:

Multi-level inheritance :

#include<iostream>
using namespace std;

class AddData      //Base Class
{
    protected:
        int subjects[3], i;
    public:
        void accept_details()
        {
                cout<<"\n Enter Marks for Three Subjects ";
                cout<<"\n ------------------------------- \n";
                cout<<"\n English : ";
                cin>>subjects[0];
                cout<<"\n Maths : ";
                cin>>subjects[1];
                cout<<"\n History : ";
                cin>>subjects[2];
        }
};
//Class Total – Derived Class. Derived from class AddData and Base class of class Percentage
class Total : public AddData
{
    protected:
        int total;
    public:
        void total_of_three_subjects()
        {
                total = subjects[0] + subjects[1] + subjects[2];
        }
};
class Percentage : public Total       //Class Percentage – Derived Class. Derived from class Total
{
    private:
        float per;
    public:
        void calculate_percentage()
        {
                per=total/3;
        }
        void show_result()
        {
                cout<<"\n ------------------------------- \n";
                cout<<"\n Percentage of a Student : "<<per;
        }
};
int main()
{
        Percentage p;
        p.accept_details();
        p.total_of_three_subjects();
        p.calculate_percentage();
        p.show_result();
        return 0;
}

Output:

Hierarchical Inheritance

#include <iostream>
using namespace std;
class Side
{
protected:
int l;
public:
void set_values (int x)
{
           l=x;
       }
};
class Square: public Side
{
public:
int sq()
{
               return (l *l);
       }
};
class Cube:public Side
{
public:
int cub()
{
               return (l *l*l);
       }
};
int main ()
{
Square s;
s.set_values (10);
cout << "The square value is::" << s.sq() << endl;
Cube c;
c.set_values (20);
cout << "The cube value is::" << c.cub() << endl;
return 0;
}

Output

Total Objects: 1
The square value is:: 100
The cube value is::8000

Multiple Inheritance in C++

#include <iostream>

using namespace std;

class Base1 {

public:

Base1()

{

cout << "This is Base 1" << endl;

}

};

class Base2 {

public:

Base2()

{

cout << "This is Base 2" << endl;

}

};

class Child: public Base1, public Base2 {

};

int main()

{

Child obj;

return 0;

}

Hybrid Inheritance in C++

#include<iostream>

using namespace std;

int a,b,c,d,e;

class A

{

protected:

public:

void getab()

{

cout<<"\nEnter a and b value:";

cin>>a>>b;

}

};

class B:public A {

protected:

public:

void getc()

{

cout<<"Enter c value:";

cin>>c;

}

};

class C

{

protected:

public:

void getd()

{

cout<<"Enter d value:";

cin>>d;

}

};

class D:public B,public C

{

protected:

public:

void result()

{

getab(); getc();

getd(); e=a+b+c+d;

cout<<"\n Addition is :"<<e;

}

};

int main()

{

D d1;

d1.result();

return 0;

}

Output

Total Objects: 1
Enter a and b value: 5 10
Enter c value: 15
Enter d value: 20

Addition is :50

NETAJI

Exercise -4 (Inheritance)

Multiple Inheritance in C++

Hybrid Inheritance in C++

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