Program: Write a Program using copy constructor to copy data of an object to another object.

#include<iostream.h>
#include<conio.h>
class code
{ 
int id;
public: 
code(){} 
code(int a) 
{ 
id = a; 
} 
code(code & x) 
{ 
id = x.id; 
} 
void display(void) 
{ 
cout<<id; 
}
};
int main()
{     
code A(100); 
code B(A); 
code C = A; 
code D; 
D = A; 
cout<<"\n id of A:"; 
A.display(); 
cout<<"\n id of B:"; 
B.display(); 
cout<<"\n id of C:"; 
C.display(); 
cout<<"\n id of D:";
D.display(); 
return 0;
}