[bug #68548] dec2base produces incorrect output for multiple negative inputs

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URL:=0A  <https://savannah.gnu.org/bugs/?68548>=0A=0A                 Summa=
ry: dec2base produces incorrect output for multiple=0Anegative inputs=0A   =
                Group: GNU Octave=0A               Submitter: chadholton=0A=
               Submitted: Thu 23 Jul 2026 04:47:35 AM UTC=0A               =
 Category: Octave Function=0A                Severity: 3 - Normal=0A       =
         Priority: 5 - Normal=0A              Item Group: Incorrect Result=
=0A                  Status: None=0A             Assigned to: None=0A      =
   Originator Name: chad=0A        Originator Email:=0A             Open/Cl=
osed: Open=0A         Discussion Lock: Unlocked=0A                 Release:=
 11.3.0=0A        Operating System: Any=0A           Fixed Release: None=0A=
         Planned Release: None=0A=0A=0A    ________________________________=
_______________________=0A=0AFollow-up Comments:=0A=0A=0A------------------=
-------------------------------------=0ADate: Thu 23 Jul 2026 04:47:35 AM U=
TC By: chad <chadholton>=0AThe current situation:=0A=0Adec2base([-1, -2], 1=
0, 3, 2)=0A=0Aans =3D=0A=0A998.9A=0A997.9A=0A=0AThis is Octave's own extens=
ion; MATLAB does not have this feature, so I don't=0Aknow the corresponding=
 correct result. But at least it can be seen that the=0Aresult of separate =
input is different from it.=0A=0Adec2base(-1, 10, 3, 2)=0Aans =3D 999.00=0A=
=0Adec2base(-2, 10, 3, 2)=0Aans =3D 998.00=0A=0A=0A=0A=0A=0A=0A=0A=0A=0A=0A=
    _______________________________________________________=0A=0AReply to t=
his item at:=0A=0A  <https://savannah.gnu.org/bugs/?68548>=0A=0A___________=
____________________________________=0AMessage sent via Savannah=0Ahttps://=
savannah.gnu.org/=0A
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