Chapter 14.5, Problem 14.17CP

Explanation of Solution

Purpose of “this” pointer:

In C++, every object should access its own address over a pointer called as “this” pointer.

• It is a special built-in pointer present in the class member function.
• The “this” pointer always points to the instance of the class which is making the function call.
• Friend function does not contain “this” pointer, because the friend function is not a member of a class.

Example:

Consider the below program as the example of “this” pointer:

//Header file

#include<iostream>

using namespace std;

// Declaration of class

class sample

{

//access specifier

private:

//declare the variable

int a;

//access specifier

public:

//return the value

void set_X (int a)

{

// return the value using "this" pointer

this->a = a;

}

//definition of "show" function

void show()