Program Of Copy Constructor In C++

#include<iostream.h>

#include<conio.h>

class add

{

private:

int x,y;           // Data Member

public:

add(int p,int q)   // Constructor

{

x=p;

y=q;

}

void display()

{

int r;

r=x+y;

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

}

};

main()

{

clrscr();

int a,b,c;

cout<<"Enter First NUmber=";

cin>>a;

cout<<"Enter Second NUmber=";

cin>>b;

add a1(a,b);

add a2(a1);  //Copy COnstructor

a1.display();

a2.display();

getch();

}

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The copy constructor is a special kind of constructor which creates a new object which is a copy of an existing one, and does it efficiently.The copy constructor receives an object of its own class as an argument, and allows to create a new object which is copy of another without building it...