What is copy constructor

What is copy constructor?

Answer:

Constructor which initializes the it's object member variables ( by shallow copying) with another object of the same class. If you don't implement one in your class then compiler implements one for you.

for example:

Boo Obj1(10); // calling Boo constructor

Boo Obj2(Obj1); // calling boo copy constructor

Boo Obj2 = Obj1;// calling boo copy constructor