| September 09, 2009 10:29:11 |
#2 |
| rajangidwani |
Member Since: July 2009 Total Comments: 5 |
RE: Define copy constructor? What is the use of copy constructor?
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Copy constructor is
1. a constructor function with the same name as the class
2. used to make deep copy of objects.
There are 3 important places where a copy constructor is called.
1. When an object is created from another object of the same type
2. When an object is passed by value as a parameter to a function
3. When an object is returned from a function.
If a copy constructor is not defined in a class, the compiler itself defines one. This will ensure a shallow copy. If the class does not have pointer variables with dynamically allocated memory, then one need not worry about defining a copy constructor. It can be left to the compiler's discretion. |
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