C functions creal and cimag return the same number?

[jimduff]

Here's a simple C program, cn.c:

Code: Select all

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

int main (void) {

static double complex c1 = 2.0 + 3.0*I;
static double complex c2 = 1.0 + 2.0*I;
static double complex r;

    r = cpow (c1, c2);
    (void)printf ("%f + %f*I\n",
                 creal (r),
                 cimag (r));
}

On linux:

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$ gcc -o cn cn.c -lm
$ ./cn
-0.463957 + -0.199530*I

On VMS 9.2-1, VirtualBox 7.0.6_Ubuntu r155176:

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$ cc cn
$ link cn
$ r cn
-0.199530 + -0.199530*I

Something doesn't look right here.

[arne_v]

It could be same problem as mentioned here:

viewtopic.php?f=16&t=8714

Math functions returning 128 bit results broken due to a mismatch between native compilers and the math RTL build with cross compilers.

Added in 40 minutes 19 seconds:
It was also mentioned here:

viewtopic.php?f=16&t=8715

[jimduff]

Thanks Arne, I did search but I searched for the C function names.