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c++pointers
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Reputation: 24675

Two pointers different information stored

Is it true that having:

int* p = new int;

and:

int* p1 = new int[5]();

in case of p1 there will be extra info stored?

Upvotes: 2

Views: 91

Answers (2)

icecrime
icecrime

Reputation: 76755

Yes, there might be.

I recommend you read the following to items from C++-faq :

A relevant quote extracted from the first link :

The run-time system stores the number of objects, n, somewhere where it can be retrieved if you only know the pointer, p. There are two popular techniques that do this. [...]

  • Over-allocate the array and put n just to the left of the first Fred object.
  • Use an associative array with p as the key and n as the value

Upvotes: 3

Prasoon Saurav
Prasoon Saurav

Reputation: 92864

This C++-FAQ entry should answer your question.

Upvotes: 3

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