× The internal search function is temporarily non-functional. The current search engine is no longer viable and we are researching alternatives.
As a stop gap measure, we are using Google's custom search engine service.
If you know of an easy to use, open source, search engine ... please contact support@midrange.com.



Hi Buck,

> C:
> printf("%f\n", pow(16,15));
> 1152921504606847000.000000
> printf("%f\n", (pow(16,14)*16));
> 1152921504606847000.000000

This code doesn't do quite the same thing, because it doesn't convert the
result to a packed field.

Unfortunately, I have NO CLUE how you work with packed fields in C, so
I'll do the exponentiation in C and then call an RPG program to convert it
to packed:


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

#pragma linkage (MYRPG,OS)
void MYRPG(double *);

int main(int argc, char **argv) {

    double z;

    z = pow(16, 15);
    printf("%.0f\n", z);

    MYRPG(&z);

    return 0;
}



     D MYRPG           PR                  ExtPgm('MYRPG')
     D   input                        8F

     D MYRPG           PI
     D   input                        8F

     D packed          s             30P 0

      /free
         packed = input;
         dsply '' '' packed;
         *inlr = *on;
      /end-free


The result of the printf is 1152921504606847000 as it was in your example,
but the result of the DSPLY is 1152921504606846980

Which is very interesting, don't you think?

As an Amazon Associate we earn from qualifying purchases.

This thread ...

Follow-Ups:
Replies:

Follow On AppleNews
Return to Archive home page | Return to MIDRANGE.COM home page

This mailing list archive is Copyright 1997-2024 by midrange.com and David Gibbs as a compilation work. Use of the archive is restricted to research of a business or technical nature. Any other uses are prohibited. Full details are available on our policy page. If you have questions about this, please contact [javascript protected email address].

Operating expenses for this site are earned using the Amazon Associate program and Google Adsense.