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Boolean

Posted on 1998-08-04
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Last Modified: 2010-04-02
I am writing a boolean variable to a file and I later need to read it into a boolean variable.  I first tried writing "TRUE" or "FALSE" to a file and read it into a boolean variable, but I did not have any luck.  I am now writing a "1" for true or a "2" for false to the file.  I read this into the boolean variable, but it doesn't seem to working either.

So, I am trying to use the CBool function that I have found, but have been unsuccessful.  Does anyone know how to use it or have another idea.  Some example code is desired.
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Question by:stchsc
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7 Comments
 
LVL 8

Expert Comment

by:MikeP090797
ID: 1169417
Boolean variables in c++ represented as 1 for TRUE and 0 for FALSE. You can write the variable itself into a file, you don't have to use any symbols:

BOOL b=TRUE;
CFile fl("C:\\1.dat", CFile::modeWrite | CFile::modeCreate);
fl.Write(b, sizeof(BOOL))
fl.Close()
0
 

Author Comment

by:stchsc
ID: 1169418
I am having trouble reading a "TRUE" or "FALSE" or "1" or "2" into a boolean variable from a file??  What to do?  I tried the code above without success.
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LVL 4

Expert Comment

by:agreen
ID: 1169419
Please post a piece of code that opens file and writes the variable.
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Author Comment

by:stchsc
ID: 1169420
Thank you very much for the help.  However, I have solved the problem.  Thanks again.
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LVL 4

Accepted Solution

by:
sganta earned 50 total points
ID: 1169421
Try this

enum  boolean = {FALSE,TRUE};

void main(void)
{
  boolean x,y,z;
  x = TRUE;
  y = FALSE;
.......
}
0
 
LVL 4

Expert Comment

by:sganta
ID: 1169422
There is small mistake

Pl. correct this as


    enum  boolean {FALSE,TRUE};

    void main(void)
    {
      boolean x,y,z;
      x = TRUE;
      y = FALSE;
    .......
    }
0
 

Author Comment

by:stchsc
ID: 1169423
Thanks for the help, but I have already figured it out.
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