How to write Uchar in file in c++

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Hi all,
I wanted to write file in c++
i have some data in unsigned char

this is my code:

typedef unsigned char UCHAR;

C#

for (int i=0; i < 4; i++)
<pre lang="xml">UCHAR ucMntFlat[4][1024];
  {
      char filename[64];
      sprintf( filename, &quot;temp%d.txt&quot;, i);
       ofstream out(filename);
      out.write((char *)ucMntFlat,sizeof(ucMntFlat));
      out.close();

   }</pre>

i m getting some special characters in file for ex:

àôôô ©+ÿ ú ú   LéPé ÿè˜AB § ë/ÿV˜‰Yœ§ 	„ 	„ÿÒÿa ò;;;;;;K¥&FZ".…W'é…P«¦…,(ÅNœÇ†DÃE_'…+ÈE=…+F…8€Å+(‡
Gž&JW+(I>:I ˆI'‰J3ÃJ)ŠPv	P$'‰C’z	P0å
È
c+®U¡êÎL˜ _–©Y¬h
[«NW#êÎ\îÍ/–Å
Ç‘ÈçÑi©‘F±ä‘].hRŸˆÑK•ZÒ'/åÕZŸ/•gšäYœ'u#`¤0ÚR½™+±[˜¨u&[]Vœá"¥-Xªíj'Ömg©s6 &3@MZgtŽ›¨µÂÏÜéö*7DQ^kx…’Ÿ¬¹ÆÓàíú!.;HUbo|‰–£°½Ê×äñþ%2?LYfs€š§´ÁÎÛèõ)6CP]jw„‘ž«¸ÅÒßìù -:GTan{ˆ•¢¯¼ÉÖãðý
$1>KXerŒ™¦³

can u plz tell me how can i save this data in file..
plz help..
god bless u all.. :)

Posted 5-May-13 23:02pm

MAU787

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Comments

Jochen Arndt 6-May-13 5:11am

What did you expect?
You are writing data from ucMntFlat which isn't initialized anywhere. So it contains garbage.

Also please edit your question. The code actually posted should not compile (the local variable ucMntFlat is defined 4 times inside a loop but accessed later outside the loop).

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CPallini · Accepted Answer · 2013-05-05T23:10:00

Solution 1

if your buffer contains binary data, you have two options:

save it, as it stands, in a binary file (basically what you already did)
save the hexadecimal representation of the binary data in a text file (in order to have a human-readable file)

Posted 5-May-13 23:10pm

CPallini