Dynamic Storage allocation - copy constructor ---C++

[radhikutti]

Hi All,

Generally copy constructor is used to create a new object from existing object.

My question is,

Do i need to allocated memory to the pointer member variables in copy constructor. Or will they share??

[deepha]

Hai,
By default the pointer variable will use the same memory of the existing object. But if u what you can over load the copy constructor.

If u are not doing so, when ur program exists you will end up in deleting the same memory twice.

[Banfa]

If u are not doing so, when ur program exists you will end up in deleting the same memory twice.

Which is a very bad thing to do.

In general if you class does not contain any allocated pointers it is often OK to just use the default copy constructor supplied by C++. If your class contains pointers that you have allocated memory to then you will almost certainly need to override the default copy constructor and write your own to allocate memory for the new class.