this incldes inheritance and its types

1. Presentation topic
Inheritance
Multilevel Inheritance
Multiple Inheritance
Hierarchical Inheritance

2. Group Members:
Mehak Ashfaq(001)
Sahar Ashfaq(002)
Tayyaba Nawaz(003)

3. What is Inheritance???
 It is very powerful feature in OOP.
 It is a concept in which the properties
of one class are available for other
class.
 The class that is being inherited is
called super class.
 The class that inherits the properties
and functions of super class is called
sub class.

4. Types of Inheritance:
 Multilevel inheritance
 Multiple inheritance
 Hierarchical inheritance

5. Multilevel Inheritance
 In this one class is inherit from base
class.
 Then this derived class becomes base
class of another class.
 Thus the class in center is called
Intermediate class.

6. Diagram or flow

7. Syntax :
 Class Person
 {……};
 Class Doctor:public Person
 {……..};
 Class Surgeon:public Doctor
 {……};

8. Example program
#include<iostream>
using namespace std;
class person
{
protected:
string name;
int phone_No;
public:
void setdata(string n,int p)
{
name=n;
phone_No=p;
}

9. void showData()
{
cout<<"name="<<name<<endl;
cout<<"phone-
no="<<phone_No<<endl;
}
};

10. class doctor:public person
{
protected:
int Id;
public:
void treat()
{
cout<<"dostors treat patients"<<endl;
}
};
class surgeon:public doctor
{
public:
void operate()
{
cout<<"surgeon operates....."<<endl;
}
};

11.  int main()
 {
 surgeon s;
 s.setdata(“mehak",123);
 s.showData();
 s.operate();
 s.treat();
 system("pause");
 }

12. Multiple Inheritance:
 In this type of inheritance there are
more than one base classes.
 And one class is inherit from these
base classes.
 The derived class has all the public
and protected properties of all base
classes.
 These base classes are separated by
commas in syntax.

13. Flow or diagram

14. Syntax:
 Class A
 {….};
 Class B
 {…};
 Class C :public A , Public B
 {….};

15. Example program
 #include<iostream>
 using namespace std;
 class father
 {
 private:
 string name;
 int phone_No;
 public:
 void function()
 {
 cout<<"father function....."<<endl;
 }
 };
 class mother
 public:
 void cook()
 {
 cout<<"mother cook food...."<<endl;
 }
 };

16.  class son
 public:
 void learn()
 {
 cout<<"son learn from books....."<<endl;
 }
 };
 int main()
 {
 son s1;
 s1.function();
 s1.cook();
 s1.learn();
 system("pause");
 }

17. Hierarchical Inheritance:
 In this every class has only one base
class.
 But a base class has many sub
classes.
 This form may b represent like a tree.
 Each derived class serves as a base
class of lower classes.

18. Flow or diagram

19. Example program
 #include<iostream>
 using namespace std;
 class person
 {
 protected:
 string name;
 int phone;
 public:
 void setData(string n, int p)
 {
 name=n;
 phone=p;

 }
 void showData()
 {
 cout<<"name and phone no are
"<<name<<endl<<phone<<endl;
 }
 };

20.  class doctor:public person
 {
 public:
 void treats()
 {
 cout<<"doctor treats patients...."<<endl;
 }
 };
 class dentist:public doctor
 {
 public:

 void clean()
 {
 cout<<"dentist cleans patient's
teeth"<<endl;
 }

 };

21.  class teacher: public person
 {
 public:
 void teach()
 {
 cout<<"teacher teach students...."<<endl;
 }
 };
 class head:public teacher
 {
 public:
 void control()
 {
 cout<<"head control overall working of
institute...."<<endl;
 }
 };

22.  int main()
 {
 dentist d1;
 d1.setData("tayyaba",2345);
 d1.showData();
 d1.treats();
 d1.clean();
 head h1;
 h1.setData("tayyaba",8976);
 h1.showData();
 h1.teach();
 h1.control();

 system("pause");
 }