ruby-list

=E3=81=93=E3=82=93=E3=81=AB=E3=81=A1=E3=81=AF=E3=80=81=E4=BB=8A=E6=9D=91=E3=
=81=A7=E3=81=99=E3=80=82 =20

=E6=A8=99=E6=BA=96=E6=B7=BB=E4=BB=98=E3=83=A9=E3=82=A4=E3=83=96=E3=83=A9=E3=
=83=AA BigDecimal =E3=82=92=E4=BD=BF=E3=81=86=E3=81=A8=E3=81=84=E3=81=86=E6=
=96=B9=E6=B3=95=E3=82=82=E3=81=82=E3=82=8A=E3=81=BE=E3=81=99=E3=80=82


require 'bigdecimal'

(1300 * (BigDecimal(=220.7=22))) =23=3D> =23<BigDecimal:100a1e1f8,'0.91E3=
',9(36)> =20
(1300 * (BigDecimal(=220.7=22))).floor =23 =3D> 910 =20
(1300 * (BigDecimal(=220.7=22))).truncate =23 =3D> 910 =20



=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F=
/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/
=5F/ =E4=BB=8A=E6=9D=91=E5=93=B2=E4=B9=9F Tetsuya Imamura
=5F/ Office: mail=40tetsuyai.com (mailto:mail=40tetsuyai.com)
=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F=
/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/=5F/

=E6=97=A5=E4=BB=98=EF=BC=9A2011=E5=B9=B49=E6=9C=8829=E6=97=A5=E6=9C=A8=E6=
=9B=9C=E6=97=A5=E3=80=81=E6=99=82=E5=88=BB=EF=BC=9A10:18=E3=80=81=E5=B7=AE=
=E5=87=BA=E4=BA=BA=EF=BC=9A=E4=B8=AD=E7=94=B0 =E9=9A=86=E9=9B=84=EF=BC=9A=


> =E4=B8=AD=E7=94=B0=E3=81=A7=E3=81=99=E3=80=82
> =E6=97=A9=E9=80=9F=E3=80=81=E3=81=94=E6=95=99=E6=8E=88=E3=81=82=E3=82=8A=
=E3=81=8C=E3=81=A8=E3=81=86=E3=81=94=E3=81=96=E3=81=84=E3=81=BE=E3=81=99=E3=
=80=82
> =20
> =E9=81=8B=E7=94=A8=E4=B8=8A=E3=81=AF
> =20
> (1300 * (0.7 * 100) / 100) =23=3D> 910.0
> (1300 * (0.7 * 100) / 100).floor =23=3D> 910
> (1300 * (0.7 * 100) / 100).truncate =23=3D> 910
> =20
> =E3=81=A8=E3=81=99=E3=82=8C=E3=81=A7=E8=89=AF=E3=81=84=E3=81=AE=E3=81=A7=
=E3=81=97=E3=82=87=E3=81=86=E3=81=8B=EF=BC=9F
> =20
> =E9=81=8B=E7=94=A8=E4=B8=8A=E3=81=AE=E3=83=97=E3=83=AD=E3=82=B0=E3=83=A9=
=E3=83=9F=E3=83=B3=E3=82=B0=E3=82=84=E6=B3=A8=E6=84=8F=E7=82=B9=E7=AD=89=E3=
=82=92
> =E3=81=94=E6=95=99=E6=8E=88=E9=A0=82=E3=81=91=E3=81=AA=E3=81=84=E3=81=A7=
=E3=81=97=E3=82=87=E3=81=86=E3=81=8B=EF=BC=9F
> =20
> =20
> =20
> On 2011/09/29, at 4:12, U.Nakamura wrote:
> =20
> > =E3=81=93=E3=82=93=E3=81=AB=E3=81=A1=E3=81=AF=E3=80=81=E3=81=AA=E3=81=
=8B=E3=82=80=E3=82=89(=E3=81=86)=E3=81=A7=E3=81=99=E3=80=82
> > =20
> > In message =22=5Bruby-list:48421=5D =E5=88=87=E3=82=8A=E6=8D=A8=E3=81=
=A6=E3=81=AB=E3=81=A4=E3=81=84=E3=81=A6=E6=95=99=E3=81=88=E3=81=A6=E3=81=8F=
=E3=81=A0=E3=81=95=E3=81=84=22
> >  on Sep.29,2011 03:37:29, <acnakada=40tam.ne.jp (mailto:acnakada=40ta=
m.ne.jp)> wrote:
> > > =E3=81=93=E3=81=AE=E9=81=95=E3=81=84=E3=81=AF=E3=81=AA=E3=81=9C=E3=81=
=A7=E3=81=97=E3=82=87=E3=81=86=E3=81=8B=EF=BC=9F=E3=80=80=E6=95=99=E3=81=88=
=E3=81=A6=E3=81=8F=E3=81=A0=E3=81=95=E3=81=84
> > =20
> > =E7=9B=AE=E3=81=AB=E8=A6=8B=E3=81=88=E3=81=A6=E3=81=84=E3=82=8B=E3=82=
=82=E3=81=AE=E3=81=8C=E5=BF=85=E3=81=9A=E6=AD=A3=E3=81=97=E3=81=84=E3=82=8F=
=E3=81=91=E3=81=A7=E3=82=82=E3=81=82=E3=82=8A=E3=81=BE=E3=81=9B=E3=82=93=E3=
=80=82
> > =20
> > =E4=B8=80=E8=88=AC=E3=81=AB=E3=80=81=E3=82=B3=E3=83=B3=E3=83=94=E3=83=
=A5=E3=83=BC=E3=82=BF=E3=81=AE=E6=B5=AE=E5=8B=95=E5=B0=8F=E6=95=B0=E7=82=B9=
=E6=95=B0=E6=BC=94=E7=AE=97=E3=81=AF2=E9=80=B2=E6=95=B0=E3=81=A7=E8=A1=8C=
=E3=82=8F=E3=82=8C=E3=82=8B=E3=81=9F=E3=82=81=E3=80=81
> > =E6=88=91=E3=80=85=E3=81=8C=E6=89=B1=E3=81=84=E3=81=9F=E3=81=8C=E3=82=
=8B10=E9=80=B2=E6=95=B0=E3=81=A7=E5=90=8C=E3=81=98=E5=80=A4=E3=82=92=E8=80=
=83=E3=81=88=E3=81=9F=E5=A0=B4=E5=90=88=E3=80=81=E5=89=B2=E3=82=8A=E5=88=87=
=E3=82=8C=E3=82=8B=E3=81=8B=E3=81=A9=E3=81=86
> > =E3=81=8B=E3=81=8C=E7=95=B0=E3=81=AA=E3=82=8B=E3=82=B1=E3=83=BC=E3=82=
=B9=E3=81=8C=E3=81=82=E3=82=8A=E3=81=BE=E3=81=99=E3=80=82
> > =E3=81=9D=E3=81=AE=E3=81=9F=E3=82=81=E3=80=8110=E9=80=B2=E6=95=B0=E3=81=
=A7=E8=80=83=E3=81=88=E3=81=9F=E5=A0=B4=E5=90=88=E3=81=AB=E5=BD=93=E7=84=B6=
=E4=BA=88=E6=B8=AC=E3=81=95=E3=82=8C=E3=82=8B=E5=80=A4=E3=81=A8=E3=80=81=E5=
=AE=9F=E9=9A=9B=E3=81=AB=E3=82=B3=E3=83=B3
> > =E3=83=94=E3=83=A5=E3=83=BC=E3=82=BF=E3=81=8C=E8=A8=88=E7=AE=97=E3=81=
=97=E3=81=9F=E7=B5=90=E6=9E=9C=E3=81=A8=E3=81=8C=E5=BE=AE=E5=A6=99=E3=81=AB=
=E7=95=B0=E3=81=AA=E3=82=8B=E5=80=A4=E3=81=A8=E3=81=AA=E3=82=8B=E3=81=93=E3=
=81=A8=E3=81=8C=E3=81=82=E3=82=8A=E3=81=BE=E3=81=99=E3=80=82
> > =20
> > =E7=A7=81=E3=81=AE=E3=82=B3=E3=83=B3=E3=83=94=E3=83=A5=E3=83=BC=E3=82=
=BF=E3=81=AE=E5=A0=B4=E5=90=88=E3=80=811300*0.7=E3=81=AE=E5=80=A4=E3=81=AF=
=E5=85=B7=E4=BD=93=E7=9A=84=E3=81=AB=E3=81=AF
> > 909.9999999999998863131622783839702606201171875
> > =E3=81=AB=E3=81=AA=E3=82=8A=E3=81=BE=E3=81=99=E3=80=82
> > =E3=82=88=E3=81=A3=E3=81=A6=E3=80=81=E5=B0=8F=E6=95=B0=E7=82=B9=E4=BB=
=A5=E4=B8=8B=E3=81=AE=E5=88=87=E6=8D=A8=E3=81=A6=E3=82=92=E8=A1=8C=E3=81=86=
=E3=81=A8909=E3=81=AB=E3=81=AA=E3=82=8A=E3=81=BE=E3=81=99=E3=80=82
> > =20
> > =20
> > =E3=81=9D=E3=82=8C=E3=81=A7=E3=81=AF=E3=80=82
> > -- =20
> > U.Nakamura <usa=40garbagecollect.jp (mailto:usa=40garbagecollect.jp)>=

> =20
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> =E4=B8=AD=E7=94=B0 =E9=9A=86=E9=9B=84
> acnakada=40tam.ne.jp (mailto:acnakada=40tam.ne.jp)
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

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[ruby-list:48424] Re: 切り捨てについて教えてください

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[#48421] 切り捨てについて教えてください — 中田隆雄 <acnakada@...>