[Octave-bug-tracker] [bug #49091] MinGW std::acosh less accurate than Linux versions

[Rik]

Follow-up Comment #16, bug #49091 (project octave):

I think this is just rounding.  Instead of using "format long", use "printf"
just as you would in C.


z = acosh (10i);
printf ("Octave acosh(10i)  = %.16f + %.16fi\n", real (z), imag (z));
z = acosh (-10i);
printf ("Octave acosh(-10i) = %.16f + %.16fi\n", real (z), imag (z));


On a Linux machine, the result for me is


Octave acosh(10i)  = 2.9982229502979698 + 1.5707963267948966i
Octave acosh(-10i) = 2.9982229502979698 + -1.5707963267948966i





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