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Heap or Stack ?

Started by Endemoniada Jan 13, 2005 at 12:25 AM 4 replies 1k views

Original Post

131

Jan 13, 2005 at 12:25 AM

Hi guys, Look at this simple example: class CStuff { public: int m_data[256]; }; // create class in heap memory CStuff* pStuff=new CStuff; Is m_data also created in heap memory ? Thanks.

fractoid

$fractoid$

fractoid

Jan 13, 2005 at 12:27 AM

Yes.

nife

Jan 13, 2005 at 1:57 AM

new and delete (as their counterparts malloc and free) are using the heap.

Zahlman

257

Zahlman

Jan 13, 2005 at 2:40 AM

Yes. The m_data is part of the chunk of memory that is allocated when new a CStuff.

blizzard999

Jan 13, 2005 at 7:16 AM

The only way to 'allocate' data on the stack is create an instance of something in the function body.

void function(void){  char buffer[256]; // stack  CStuff c; //stack sizeof(CStuff)==256   //and so on}

Zipster

511

Zipster

Jan 13, 2005 at 7:21 AM

Well, there's technically _alloca that allocates from the stack instead of the heap. But I've personally never used it.

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