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List:       kde-devel
Subject:    Re: dumb C++ question
From:       Mats Loman <lom () wombat ! ludvika ! se>
Date:       1999-05-23 21:31:12
[Download RAW message or body]

On Sun, 23 May 1999, Rik Hemsley wrote:

Well the sizeof(*var) tells that the size of the object the pointer points
at is of size 1 byte, assuming that var is a char. 

See:
#include <iostream.h>

main()
{
  char *var;

  cout << "Without new:" <<  sizeof(*var) << "\n";

  var = new char[0];
  cout << "With new char[0]:" << sizeof(*var) << "\n";
  delete[] var;
  

  var = new char[100];
  cout << "With char[100]:"<< sizeof(*var) << "\n";
  delete[] var;

}

Gives:

Without new:1
With new char[0]:1
With char[100]:1  


//Mats Loman

> 
> Stephan:
> 
> > Hmm, what I've done now is to call malloc(1) when
> > I get a new(0) as malloc(0) is not allowed.
> 
> Don't bother.
> 
> new(0) is ok.
> 
> Do a sizeof(*var) and see what you get. With char (not QChar) it should give 1.
> 
> Cheers,
> Rik
> 
> 
> --
> KDE - Colour outside the lines  : http://www.kde.org
> [[without]] - software for KDE  : http://without.netpedia.net
> 
> 

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