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🟣 OOP  ·  Lesson 41

this Pointer

this Pointer

What is this Pointer?

this Pointer
The this pointer stores the address of the current object. It is used to distinguish object members from parameters with the same name.
Level
🟣 Object-Oriented Programming
Example File
this-pointer.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

TermMeaning / Use
thisThis used in this Pointer programming.
current objectCurrent object used in this Pointer programming.
member accessMember access used in this Pointer programming.
pointerPointer used in this Pointer programming.

Syntax / Pattern

this->member = parameter;

Example Program

#include <iostream>
using namespace std;
class Student{
    int marks;
public:
    void setMarks(int marks){ this->marks = marks; }
    void show(){ cout << marks; }
};
int main(){ Student s; s.setMarks(89); s.show(); }

Expected Output

89

Program Explanation

  • this->marks means the data member.
  • marks without this is the parameter.
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?

  • setter methods
  • method chaining
  • operator overloading

Common Mistakes

  • Using this in static function.
  • Confusing this pointer with object name.

Practice Tasks

  1. Create setter using this pointer.
  2. Explain why this is useful when names are same.

Summary

this Pointer is an important C++ topic. Learn the definition, understand the syntax, run the example program and then solve the practice tasks to make the concept strong.

What is this Pointer?

this Pointer
The this pointer stores the address of the current object. It is used to distinguish object members from parameters with the same name.
Level
🟣 Object-Oriented Programming
Example File
this-pointer.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

TermMeaning / Use
thisThis used in this Pointer programming.
current objectCurrent object used in this Pointer programming.
member accessMember access used in this Pointer programming.
pointerPointer used in this Pointer programming.

Syntax / Pattern

this->member = parameter;

Example Program

#include <iostream>
using namespace std;
class Student{
    int marks;
public:
    void setMarks(int marks){ this->marks = marks; }
    void show(){ cout << marks; }
};
int main(){ Student s; s.setMarks(89); s.show(); }

Expected Output

89

Program Explanation

  • this->marks means the data member.
  • marks without this is the parameter.
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?

  • setter methods
  • method chaining
  • operator overloading

Common Mistakes

  • Using this in static function.
  • Confusing this pointer with object name.

Practice Tasks

  1. Create setter using this pointer.
  2. Explain why this is useful when names are same.

Summary

this Pointer is an important C++ topic. Learn the definition, understand the syntax, run the example program and then solve the practice tasks to make the concept strong.

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