RE: [Dev-C++] problem with stdin and stdout

[Ioannis V. <no...@ya...>]

> -----Original Message-----
> From: dev...@li... 
> [mailto:dev...@li...] On Behalf 
> Of Luigi Santillo
> Sent: Wednesday, January 02, 2002 5:59 PM
> To: dev...@li...
> Subject: [Dev-C++] problem with stdin and stdout
> 
> 
> Hello list
> 
> I tried to make a simple program that prints the amount of 
> characters found 
> in a file. Here is my code:
> 
> count.c
> ------
> #include <stdio.h>
> 
> int
> main()
> {
>    int n = 0;
> 
>    while (getchar() != EOF)
>      n++;
> 
>    printf("n = %d\n", n);
> 
>    return 0;
> }
> ---------
> 
> 
> One could use the program in one of these 4 ways:
> 1) count              get input from stdin and print amount 
> of character to 
> stdout
> 2) count < foo        get input from file "foo" (using 
> redirection) print 
> to  stdout
> 3) count > bar        get input from stdin, print output to file "bar"
> 4) count < foo > bar  get input from "foo", print output to "bar"
> 
> IMHO the above 4 commands are equivalent (to the extent that one 
> types  what is contained in the file "foo", when the input 
> comes "directly" 
> from stdin), so I expected the code to behave in the same way 
> independent 
> of the command I used; here are my results: say that the file 
> "foo" is the 
> following (an '@' stands for EOF):
> 
> foo
> -----
> aa@
> -----
> 
> When I try command #2 and #4 I get the correct answer: that 
> is "n = 2". When I try command #3 (and manually type 
> "aa+CTRL-z" on stdin) I find that 
> "bar" is
> 
> bar
> ------
> n = 2
> ------
> 
> Strange enough when I use command #1 (and manually type 
> "aa+CTRL-z" on 
> stdin) I see nothing displayed!


Nothing is displayed to me too when using MINGW32. However when i sue
the BC++ 5.5 compiler the thing works correctly:

C:\c>temp
aa^Z
n = 2


So it is probably a compiler defect.



> 
> I have tried the above with MinGW 2.95 on a Win98SE system. I 
> think the 
> problem is related to Windows, because I remember asking a 
> similar question 
> to Mr. Vranos and he answered me that he had no problem, he 
> was using MinGW 
> 2.95 too, but his system was running a different version of 
> Windows (I'm 
> not sure which one).


Yes i remeber you had asked something like that (i don't remember what
exactly) but i do not remember the answer i gave to you. Anyway i think
we have to do with compiler defect(s) and i do not think it has to do
with the operating system (this ctrl-z thing).
My OS is Win2k.

> 
> I would appreciate if someone, running Windows 98SE, could 
> try the above 
> using my same compiler (it is the one shipped with Dev-C++ 
> 4.0 and I think, 
> but am not sure, Dev-C++ 4.1) and let me know what happens: 
> at least I 
> would make sure that the problem is related to my 
> installation of Windows. 

No, it is the compiler.



Ioannis

* Ioannis Vranos
* Programming pages: http://www.noicys.f2s.com
* Alternative URL: http://run.to/noicys