🟣 OOP · Lesson 45

Inheritance in C++

What is Inheritance in C++?

Inheritance in C++
Inheritance allows a class to acquire properties and functions of another class. It supports code reuse and hierarchical design.

Level
🟣 Object-Oriented Programming

Example File
inheritance.cpp

Main Focus
Concept + syntax + practical C++ program

Why should you learn this?

It helps you write correct and readable C++ programs.
It is used repeatedly in school practicals, projects and competitive programming.
It builds the base for advanced topics such as OOP, STL and data structures.

Important Terms

Term	Meaning / Use
base class	Inheritance in C++ programming में Base class use होता है।
derived class	Inheritance in C++ programming में Derived class use होता है।
is-a relationship	Is-Inheritance in C++ programming में a relationship use होता है।
reuse	Inheritance in C++ programming में Reuse use होता है।

Syntax / Pattern

C++

class Derived : access Base { };

Example Program

main.cpp

#include <iostream>
using namespace std;
class Person{ public: void show(){ cout << "Person "; } };
class Student : public Person{ public: void study(){ cout << "Student"; } };
int main(){ Student s; s.show(); s.study(); }

Expected Output

Person Student

Program Explanation

Student inherits show() from Person.
study() belongs to Student.

Exam Tip: In C++ practical answers, write the logic first, then the program, then expected output. For theory, always include one suitable example.

Where will you use it?

person-student model
employee-manager model
game characters

Common Mistakes

Using inheritance when composition is better.
Forgetting access mode in inheritance.

Practice Tasks

Create Vehicle and Car classes.
Explain public inheritance.

Summary

Inheritance in C++ एक ज़रूरी C++ topic है। परिभाषा सीखें, syntax समझें, example program चलाएं और फिर practice tasks हल करके concept मज़बूत करें।

Inheritance in C++ क्या है?

Inheritance in C++
Inheritance allows a class to acquire properties and functions of another class. It supports code reuse and hierarchical design.

Level
🟣 Object-Oriented Programming

Example File
inheritance.cpp

मुख्य फोकस
Concept + syntax + practical C++ program

इसे क्यों सीखें?

यह आपको सही और पढ़ने-योग्य C++ programs लिखने में मदद करता है।
यह school practicals, projects और competitive programming में बार-बार use होता है।
यह OOP, STL और data structures जैसे advanced topics की नींव बनाता है।

ज़रूरी Terms

Term	अर्थ / उपयोग
base class	Base class Inheritance in C++ programming में use होता है।
derived class	Derived class Inheritance in C++ programming में use होता है।
is-a relationship	Is-a relationship Inheritance in C++ programming में use होता है।
reuse	Reuse Inheritance in C++ programming में use होता है।

Syntax / Pattern

C++

class Derived : access Base { };

Example Program

main.cpp

#include <iostream>
using namespace std;
class Person{ public: void show(){ cout << "Person "; } };
class Student : public Person{ public: void study(){ cout << "Student"; } };
int main(){ Student s; s.show(); s.study(); }

Expected Output

Person Student

Program Explanation

Student inherits show() from Person.
study() belongs to Student.

Exam Tip: In C++ practical answers, write the logic first, then the program, then expected output. For theory, always include one suitable example.

Where will you use it?

person-student model
employee-manager model
game characters

आम गलतियाँ (Common Mistakes)

Using inheritance when composition is better.
Forgetting access mode in inheritance.

अभ्यास (Practice Tasks)

Create Vehicle and Car classes.
Explain public inheritance.

सारांश

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