CODEWITHSUNDEEP
c++
barssala
barssala

Reputation: 483

About memory and delete object in c++

I will give some examples and explain. First, I declare some object like

CString* param = new CString[100]

And when I declare this one, my memory would increase a little bit because it's some implemented string. Then I store this object in some list of CString just like

List<CString> myList = new List<CString>; // new list of CString

myList.add(param);

This is my question: I wanna know, when I delete myList, my param isn't deleted, right? And memory in param still exists.

Do I misunderstand?

Upvotes: 1

Views: 156

Answers (2)

oopsi
oopsi

Reputation: 2039

Rule of thumb for c++ : If you type new you'll need a delete, except if you're using some kind of smart pointer.

Notice in your case you'll need to use 

delete [] param ;

As you are deleting an array.

Upvotes: 1

Luchian Grigore
Luchian Grigore

Reputation: 258608

That code won't compile because myList holds objects, not pointers, and because myList is an object, not a pointer, so new is illegal there:

List<CString> myList; is an object of type List<CString>. new List<CString>; returns a List<CString>*. param is a CString*. myList.add() expects a CString, not a CString*.

Bottom line: these are all basic concepts, grab a good book and read it. C++ is a complicated language, you can't just learn it from example snippets or assume the same concepts and syntax are the same as other languages.

Upvotes: 5

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