This code:

long i, j;
i =j*5;

causes these errors:

ERROR   C:\MPLAB\MPLABC14.LIB 20:16:ILLEGAL OR UNDEFINED ARGUMENT _t 1
ERROR   C:\MPLAB\MPLABC14.LIB 21:7:EXPECTED  ;,
ERROR   C:\MPLAB\MPLABC14.LIB 21:7:EXPECTED  , got s
ERROR   C:\MPLAB\MPLABC14.LIB 24:5:ILLEGAL OR UNDEFINED ARGUMENT R1 .. 6
ERROR   C:\MPLAB\MPLABC14.LIB 25:5:ILLEGAL OR UNDEFINED ARGUMENT R1 .. 6
ERROR   C:\MPLAB\MPLABC14.LIB 26:5:ILLEGAL OR UNDEFINED ARGUMENT R1 .. 6
ERROR   C:\MPLAB\MPLABC14.LIB 27:12:ILLEGAL OR UNDEFINED ARGUMENT R1 .. 6
ERROR   C:\MPLAB\MPLABC14.LIB 35:14:ILLEGAL OR UNDEFINED ARGUMENT _r 2
ERROR   C:\MPLAB\MPLABC14.LIB 36:14:ILLEGAL OR UNDEFINED ARGUMENT _q 2
ERROR   C:\MPLAB\MPLABC14.LIB 37:14:ILLEGAL OR UNDEFINED ARGUMENT _s 2


I find this very disturbing since a file named ctutor.c which shipped with
the compiler contains this code:

#include <16c54.h>
#include <math.h>

unsigned int  Num1=2, Num2=3;           // Declare two eight bit numbers.
unsigned long Num3;                     // Declare one long for the result.
unsigned int  Num3High @ &Num3+1;       // Create an address for the top
byte.

void main() {
   while(1) {
      Num3 = Num1 * Num2;               // Multiply the two bytes into a
long.
      }
   }


Thanks,
David Novak
Hopkins Mfg.
novak@valu-line.net

----------
> From: Andy Kunz <montana@FAST.NET>
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: Multiplication
> Date: Monday, February 24, 1997 5:25 PM
>
> At 02:44 PM 2/24/97 -0600, you wrote:
>>Why can't I use multiplication with MPLABC and the 16C63? I get all kinds
> >of errors when I attempt it. Is it not possible, or am I doing something
> >wrong?
>
> The 16C parts don't have hardware multiply.
>
> If using software, how about posting the routine.
>
> Andy