Copy Constructor 1

• There are two common situations when an object must be copied implictly:
  1. When an object is passed to a function as a value parameter
  2. When an object is returned by a function as a value

IntArray Fun (IntArray a);  // prototype
...
IntArray a,b;
b = Fun(a);    // copy of argument "a" made when function is called 
               // copy of return value made as function returns

• In addition to at least one where objects are copied explicitly:
  3. When an object is initialized in a declaration

IntArray a;
...
IntArray b(a); // explicit call to copy constructor - make "b" a copy of "a"