strcmp problem

**White Wolf** · Jul 19 '05, 05:59 PM

Re: strcmp problem

Shane Peck wrote:[color=blue]
> I am having a problem using the strcmp function. If I debug my
> program from within Visual C++, strcmp returns 0 as I want, but if I
> build the project and then try and execute it, it seems to think the
> strings are different. I've got no idea why!! Any help appreciated,
> heres my code :
>
> AfxMessageBox( param, MB_OK, 0 );
> char *wow = "!";
> if( stricmp( param, wow ) == 0 )
> {//the parameter is !, so the line is a comment, skip over it
> AfxMessageBox( "Got a comment", MB_OK, 0 );
>
> The message box that I put before the comparison outputs an !, so I
> really have no idea why it's returning non-zero. I've also tried
> memcmp, and it gives the same result.[/color]

Print those two variables to the debug console as strings (note: not
debugger, debug console) and make sure you print them with some delimiters
around. If strcmp says they are not the same I strongly believe that they
are not the same.

--
WW aka Attila

**Klaus Eichner** · Jul 19 '05, 05:59 PM

Re: strcmp problem

"Shane Peck" <shanepeck@iine t.net.au> wrote in message
news:3f6a4fb0$0 $23586$5a62ac22 @freenews.iinet .net.au...[color=blue]
> I am having a problem using the strcmp function. If I debug my program[/color]
from[color=blue]
> within Visual C++, strcmp returns 0 as I want, but if I build the project
> and then try and execute it, it seems to think the strings are different.
> I've got no idea why!! Any help appreciated, heres my code :
>
> AfxMessageBox( param, MB_OK, 0 );
> char *wow = "!";
> if( stricmp( param, wow ) == 0 )[/color]

just a guess: maybe the problem is that you are using 'stricmp' instead of
'strcmp' ?
[color=blue]
> {//the parameter is !, so the line is a comment, skip over it
> AfxMessageBox( "Got a comment", MB_OK, 0 );[/color]

**Frank Schmitt** · Jul 19 '05, 06:00 PM

Re: strcmp problem

"Shane Peck" <shanepeck@iine t.net.au> writes:
[color=blue]
> I am having a problem using the strcmp function. If I debug my program from[/color]

here you say you are using strcmp which is a standard C function - ok.
[color=blue]
> within Visual C++, strcmp returns 0 as I want, but if I build the project
> and then try and execute it, it seems to think the strings are different.
> I've got no idea why!! Any help appreciated, heres my code :
>
> AfxMessageBox( param, MB_OK, 0 );
> char *wow = "!";
> if( stricmp( param, wow ) == 0 )[/color]

but here you use stricmp (note the 'i')
(which isn't standard and hence OT in c.l.c++, BTW).

Which one are you using actually? And post some minimal compilable code
illustrating the problem.

HTH & kind regards
frank

--
Frank Schmitt
4SC AG phone: +49 89 700763-0
e-mail: frankNO DOT SPAMschmitt AT 4sc DOT com

**Chris Theis** · Jul 19 '05, 06:05 PM

Re: strcmp problem

"Shane Peck" <shanepeck@iine t.net.au> wrote in message
news:3f6a4fb0$0 $23586$5a62ac22 @freenews.iinet .net.au...[color=blue]
> I am having a problem using the strcmp function. If I debug my program[/color]
from[color=blue]
> within Visual C++, strcmp returns 0 as I want, but if I build the project
> and then try and execute it, it seems to think the strings are different.
> I've got no idea why!! Any help appreciated, heres my code :
>
> AfxMessageBox( param, MB_OK, 0 );
> char *wow = "!";
> if( stricmp( param, wow ) == 0 )
> {//the parameter is !, so the line is a comment, skip over it
> AfxMessageBox( "Got a comment", MB_OK, 0 );
>
> The message box that I put before the comparison outputs an !, so I really
> have no idea why it's returning non-zero. I've also tried memcmp, and it
> gives the same result.
>
> Thanks for any help...
>[/color]

If I get you correctly then any line containing (starting?) a with a "!"
should be skipped. What you're looking for is not string comparison to
another string but to search for a character in a string. The solution to
your problem is either to use the string class which will make your life a
lot easier or to use strchr:

char pParam1[] = "! this is a comment";
char pParam2[] = "this is NO comment!";
int Wow = '!';
char* pRet;

pRet = strchr( pParam1, Wow );
if( pRet && static_cast<int >(pRet - pParam1 + 1) == 1 ) // probably you
might encounter blanks before the comment symbol which have to be stripped
before this is check is done!!!
cout << "Comment found: " << pParam1 << endl;
else
cout << "No comment found: " << pParam2 << endl;

pRet = strchr( pParam2, Wow );
if( pRet && static_cast<int >(pRet - pParam2 + 1) == 1 )
cout << "Comment found: " << pParam2 << endl;
else
cout << "No comment found: " << pParam2 << endl;

HTH
Chris

**Risto Lankinen** · Jul 19 '05, 06:08 PM

Re: strcmp problem

"Frank Schmitt" <frank.schmitt@ 4sc.com> wrote in message
news:4c4qz9t1qv .fsf@scxw21.4sc ...[color=blue]
> "Shane Peck" <shanepeck@iine t.net.au> writes:[color=green]
> >
> > AfxMessageBox( param, MB_OK, 0 );
> > char *wow = "!";
> > if( stricmp( param, wow ) == 0 )[/color]
>
> but here you use stricmp (note the 'i')[/color]

Using stricmp should have no effect in the example
code, though (note the '!' which is the same in upper
and lower case).

- Risto -

**Kevin Goodsell** · Jul 19 '05, 06:10 PM

Re: strcmp problem

Risto Lankinen wrote:
[color=blue]
> "Frank Schmitt" <frank.schmitt@ 4sc.com> wrote in message
> news:4c4qz9t1qv .fsf@scxw21.4sc ...
>[color=green]
>>"Shane Peck" <shanepeck@iine t.net.au> writes:
>>[color=darkred]
>>> AfxMessageBox( param, MB_OK, 0 );
>>> char *wow = "!";
>>> if( stricmp( param, wow ) == 0 )[/color]
>>
>>but here you use stricmp (note the 'i')[/color]
>
>
> Using stricmp should have no effect in the example
> code, though (note the '!' which is the same in upper
> and lower case).
>[/color]

We can't know how stricmp() will affect the example. The definition of
stricmp() was not given, and it's not a standard function, so we have no
idea what it does.

-Kevin
--
My email address is valid, but changes periodically.
To contact me please use the address from a recent posting.