Re: [Mingw-users] scanf, fscanf, gets, fgetc, and mostly-every-other-input-function problem

[Jeremy B. <je...@de...>]

>From MSDN:
%c: When used with scanf functions, specifies single-byte character; when 
used with wscanf functions, specifies wide character. White-space characters 
that are ordinarily skipped are read when c is specified. To read next 
non-white-space single-byte character, use %1s; to read next non-white-space 
wide character, use %1ws.

So the program is correctly reading your text.  It reads 'u' '\r' '\n' '6', 
and if you would have used %d in your printf statements you would have seen 
this.

----- Original Message ----- 
From: "Felix VIII" <alp...@ho...>
To: <min...@li...>
Sent: Thursday, July 20, 2006 5:32 PM
Subject: [Mingw-users] scanf, fscanf, gets, fgetc,and 
mostly-every-other-input-function problem


> Alas, I thought the problem was resolved, but no, it reoccurs:
>
> [test.c file]:
> #include <stdio.h>
>
> int main()
> {
> char a,b,c,d;
> int e,f,g,h;
> printf("start");
> e=fscanf(stdin,"%c",&a);
> f=fscanf(stdin,"%c",&b);
> g=fscanf(stdin,"%c",&c);
> h=fscanf(stdin,"%c",&d);
> printf("\n\n\"%c%c%c%c\"=character input\n",a,b,c,d);
> printf("%d%d%d%d=fscanf output",e,f,g,h);
> }
>
> [entered into command prompt]:
> C:\MinGW>gcc test.c -o test.exe
>
> C:\MinGW>test.exe
> startu
> 6
>
> "u
> 6"=character input
> 1111=fscanf output
> C:\MinGW>test.exe
> start
>
>
> "    "=character input
> 1111=fscanf output
> [the actual characters entered for the first test are
> 'u','<return>','<space>', and '6'.  For the second case the characters are
> all spaces.]
> [ I have tested this with scanf, gets, fgetc with similar arrangements and
> the results have been the same]
> [end]
>
> And that is my problem; I have been told that scanf() stops reading input
> when it encounters a space, but that appears not to be so here.  As I said
> earlier, the scanf and gets functions only work every other time, I 
> believe
> that is because when I hit the <return> key the <return> is automatically
> entered as the input to the next input function.
>
> ???
>
> _________________________________________________________________
> Express yourself instantly with MSN Messenger! Download today - it's FREE!
> http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/
>
>
> -------------------------------------------------------------------------
> Take Surveys. Earn Cash. Influence the Future of IT
> Join SourceForge.net's Techsay panel and you'll get the chance to share 
> your
> opinions on IT & business topics through brief surveys -- and earn cash
> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
> _______________________________________________
> MinGW-users mailing list
> Min...@li...
>
> You may change your MinGW Account Options or unsubscribe at:
> https://lists.sourceforge.net/lists/listinfo/mingw-users
>