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Date: Sat, 08 Jan 2005 12:14:03 +0200
From: "Eli Zaretskii" <eliz AT gnu DOT org>
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To: djgpp AT delorie DOT com
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	(sam124 AT operamail DOT com)
Subject: Re: Strange problems with printf()
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> From: "Samuel Lauber" <sam124 AT operamail DOT com>
> Date: Sat, 08 Jan 2005 06:54:37 GMT
> 
> int printf(char *, ...);
> int main(void)
> {
>      printf("%f\n", 1);
> }
> 
> Compile it, and it would say `Unnormal'. Is this a bug?

A bug, yes, but in your program, not in the compiler or the library.
If you compile with the -Wall switch, which prints warnings for
dubious code, the compiler says:

    cfp.c: In function `main':
    cfp.c:4: warning: double format, different type arg (arg 2)
    cfp.c:5: warning: control reaches end of non-void function

The first warning is directly related to what you see: you should use

     printf("%f\n", 1.0);

i.e. make the argument be a float or a double, not an int.

The second warning says that you should end this program with

     return 0;

since `main' is declared a function that returns an int.