Answer Posted / achal ubbott

Question on copy constructor is a classic one for an
interview. Since most modern day c++ compilers provide a
default copy constructor, most people don't get to try
hands over it. But in some cases it becomes mandatory to
define your own copy constructor and override the default
one.
So the places when CC is invoked are:-

1. calling a function e.g. void f(sample A);

2. creating an object from the existing object.
e.g. sample A=B; // here B is existing object.

3. When a function returns a copy of object.

e.g. sample f()
{
sample a;
return a;
}

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