Program Of This Pointer In C++

#include<iostream.h>

#include<conio.h>

class add

{

private:

int a,b;

public:

void getdata(int a,int b)

{

 this->a=a;

 this->b=b;

}

void display()

{

int c;

c=a+b;

cout<<"\n NAswer="<<c;

cout<<"\n this=="<<this;

}

}

main()

{

clrscr();

int a,b;

add a1,a2;

cout<<"enter first no.";

cin>>a;

cout<<"enter second no.";

cin>>b;

a1.getdata(a,b);

a1.display();

a2.getdata(6,3);

a2.display();

getch();

}

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It is a misbelief that the 'this' pointer is a hidden member of a class or struct. It is a hidden parameter of non-static member functions. When you declare a function the compiler adds an extra parameter to function's prototype. The type of the parameter depends on how the function is declared.