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clonning

 
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What is clonning?How to implement it?Why is not copying CONSTRUCTOR?
How does it different from object = object?
 
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Cloning means copying an object. You can certainly implement the clone() method by using a copy constructor -- i.e.,

So the distinction can be rather subtle. Note that you can ask an object for a clone() of itself without knowing its exact class; to use the copy constructor directly you have to know the exact class, which gives you less flexibility.
 
thomas davis
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I did not understand your explanation....
What is the use of clonning? And when do we have to use cloning? Why does it is being used for classes which have heavy constructors?
If I have two objects say a and b, If I use the following code for copying
A=b;
This copies all the related objects and contents of object b to a, then why does it necessary to have cloning concept?
 
Ernest Friedman-Hill
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The code

does not copy the object referred to by b. It makes both variables refer to the same object, so that, for example

prints "37".
 
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