From:	awnbreel AT panix DOT com (Michael R Weholt)
Newsgroups:	comp.os.msdos.djgpp
Subject:	modulus operation with floats requires emulator?
Date:	Sat, 18 Jan 97 19:18:28 GMT
Organization:	Rookery Prawl
Lines:	31
Message-ID:	<5br7o7$p2e@news1.panix.com>
NNTP-Posting-Host:	mrw.dialup.access.net
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

        I'm using Win95 on a pentium.  Norton Utilities reports that 
"Math Support is on chip".

        When I try to use the modulus operation, I can only get it to 
work using integers, not floats.  When I try it with floats, the 
debugger reports: "Error: invalid operands to binary %".  I get this 
message even when I try including math.h, or adding the -lm link 
option.

        Does this mean I have to get the 387 emulator and use it?

        I'm just learning C, so I suppose I could have something wrong 
with the source.  The following gets the debug message described 
above:

#include <stdio.h>
#include <math.h>

float   mod;

main()
{
    mod = 9.0 % 5.0;

    (void) printf("modulus: %f\n", mod);
    return(0);
}

Michael R Weholt
 http://www.panix.com/~mrw/

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