From: Sean Melody <s-melody AT STOP DOT SPAMMERS DOT nwu DOT edu>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: A nice trap!
Date: Sun, 31 May 1998 20:33:08 -0500
Organization: Northwestern University, Evanston, IL, US
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References: <199805311442 DOT KAA17864 AT delorie DOT com>
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Always nice to see an author slap the idiots around ;) Go DJ.
Sean Melody


DJ Delorie wrote:
> 
> > void main( void)
> > {
> >     float f;
> >     f = 55 / 77;
> >     printf( "%f", f);
> > }
> > /* and please mail me YOUR results */
> 
> It does exactly what I expect: it prints 0.  If you expect anything
> else, you don't understand how C works.  When you do this:
> 
>         f = 55 / 77;
> 
> The compiler evaluates the 55/77 part first - the division of two
> *integers*.  Integer division returns an integer result (0).  *Then*
> it's converted to a floating point number (0.0) in order to store it.
> 
> If you want the compiler to divide floating point numbers, you have to
> tell it to do that:
> 
>         f = 55.0 / 77.0;