Discussion :

[alen]

Bonjour,
Quelqu'un pourait'il me dire que co�te en m�moire une variable de type CString et comment �volue t'elle en fonction du nombre de carat�res?

Merci

[farscape]

salut,
difficile de r�pondre, d�j� la r�ponse sera diff�rente pour visual 6.0 et visual 2005.
ce dernier utilisant la SL.
le cout est �gal a la chaine en m�moire + les donn�es membres permettant la gestion de l'objet.
c'est cette derniere partie qui est difficile a �valuer sauf peut �te a utiliser une fonction comme GlobalMemoryStatus avant et apres l'allocation de l'objet.

Code :

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//  Sample output:
//  The MemoryStatus structure is 32 bytes long.
//  It should be 32.
//  78 percent of memory is in use.
//  There are   65076 total Kbytes of physical memory.
//  There are   13756 free Kbytes of physical memory.
//  There are  150960 total Kbytes of paging file.
//  There are   87816 free Kbytes of paging file.
//  There are  1fff80 total Kbytes of virtual memory.
//  There are  1fe770 free Kbytes of virtual memory.
 
#include <windows.h>
 
// Use to change the divisor from Kb to Mb.
 
#define DIV 1024
// #define DIV 1
 
char *divisor = "K";
// char *divisor = "";
 
// Handle the width of the field in which to print numbers this way to
// make changes easier. The asterisk in the print format specifier
// "%*ld" takes an int from the argument list, and uses it to pad and
// right-justify the number being formatted.
#define WIDTH 7
 
void main(int argc, char *argv[])
{
  MEMORYSTATUS stat;
 
  GlobalMemoryStatus (&stat);
 
  printf ("The MemoryStatus structure is %ld bytes long.\n",
          stat.dwLength);
  printf ("It should be %d.\n", sizeof (stat));
  printf ("%ld percent of memory is in use.\n",
          stat.dwMemoryLoad);
  printf ("There are %*ld total %sbytes of physical memory.\n",
          WIDTH, stat.dwTotalPhys/DIV, divisor);
  printf ("There are %*ld free %sbytes of physical memory.\n",
          WIDTH, stat.dwAvailPhys/DIV, divisor);
  printf ("There are %*ld total %sbytes of paging file.\n",
          WIDTH, stat.dwTotalPageFile/DIV, divisor);
  printf ("There are %*ld free %sbytes of paging file.\n",
          WIDTH, stat.dwAvailPageFile/DIV, divisor);
  printf ("There are %*lx total %sbytes of virtual memory.\n",
          WIDTH, stat.dwTotalVirtual/DIV, divisor);
  printf ("There are %*lx free %sbytes of virtual memory.\n",
          WIDTH, stat.dwAvailVirtual/DIV, divisor);
}