C++ this Pointer

by Online Tutorials Library July 14, 2022

C++ this Pointer

In C++ programming, this is a keyword that refers to the current instance of the class. There can be 3 main usage of this keyword in C++.

It can be used to pass current object as a parameter to another method.
It can be used to refer current class instance variable.
It can be used to declare indexers.

C++ this Pointer Example

Let’s see the example of this keyword in C++ that refers to the fields of current class.

 #include <iostream> using namespace std; class Employee {    public:        int id; //data member (also instance variable)            string name; //data member(also instance variable)        float salary;        Employee(int id, string name, float salary)           {                this->id = id;               this->name = name;               this->salary = salary;          }          void display()           {               cout<<id<<”  “<<name<<”  “<<salary<<endl;           }   }; int main(void) {     Employee e1 =Employee(101, “tutor”, 890000); //creating an object of Employee      Employee e2=Employee(102, “Nakul”, 59000); //creating an object of Employee     e1.display();       e2.display();       return 0; } 

Output:

101  tutor  890000 102  Nakul  59000

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