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以13进制的系统为例,398表示的数字是(十进制下的){{nowrap|3 × 13<sup>2</sup> + 9 × 13<sup>1</sup> + 8 × 13<sup>0</sup>}} = 632。 |
以13进制的系统为例,398表示的数字是(十进制下的){{nowrap|3 × 13<sup>2</sup> + 9 × 13<sup>1</sup> + 8 × 13<sup>0</sup>}} = 632。 |
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若是在''b''进制({{nowrap|''b'' > 1}})下,各位数数字是{{nowrap|''d''<sub>1</sub> … ''d<sub>n</sub>''}}的数,其值为 {{nowrap|''d''<sub>1</sub>''b''<sup>''n''−1</sup> + ''d''<sub>2</sub>''b''<sup>''n''−2</sup> + … + ''d<sub>n</sub>b''<sup>0</sup>}},其中 {{nowrap|0 ≤ ''d<sub>i</sub>'' < ''b''}}.<ref name="morris_mano_p13_14" />。在十进制中,有个位数、十位数、百位数……等,而在''b''进制中,有个位数、''b''<sup>1</sup>位数、''b''<sup>2</sup>位数……等<ref>{{Cite web|url=https://experimonkey.com/articles/?aid=binary-how-do-computers-talk|title=Binary: How Do Computers Talk? {{!}} Experimonkey|website=experimonkey.com|access-date=2018-12-02 }}{{Dead link|date= |
若是在''b''进制({{nowrap|''b'' > 1}})下,各位数数字是{{nowrap|''d''<sub>1</sub> … ''d<sub>n</sub>''}}的数,其值为 {{nowrap|''d''<sub>1</sub>''b''<sup>''n''−1</sup> + ''d''<sub>2</sub>''b''<sup>''n''−2</sup> + … + ''d<sub>n</sub>b''<sup>0</sup>}},其中 {{nowrap|0 ≤ ''d<sub>i</sub>'' < ''b''}}.<ref name="morris_mano_p13_14" />。在十进制中,有个位数、十位数、百位数……等,而在''b''进制中,有个位数、''b''<sup>1</sup>位数、''b''<sup>2</sup>位数……等<ref>{{Cite web|url=https://experimonkey.com/articles/?aid=binary-how-do-computers-talk|title=Binary: How Do Computers Talk? {{!}} Experimonkey|website=experimonkey.com|access-date=2018-12-02 }}{{Dead link|date=2020-02}}</ref>。 |
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常用的进制系统有: |
常用的进制系统有: |
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|page = 257 |
|page = 257 |
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|edition = Paperback |
|edition = Paperback |
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|url = https://books.google.com/books?id=1C4NKp4zgIQC&pg=PA257 |
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|access-date = 2021-08-13 |
|access-date = 2021-08-13 |
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|archive-date = 2021-08-13 |
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|archive-url = https://web.archive.org/web/20210813144445/https://books.google.com/books?id=1C4NKp4zgIQC&pg=PA257 |
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|dead-url = no |
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| title=Negative Based Number Systems |
| title=Negative Based Number Systems |
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| journal=Mathematics Magazine |
| journal=Mathematics Magazine |
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| date= |
| date=1979-09 |
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| volume=52 |
| volume=52 |
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| issue=4 |
| issue=4 |
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| pages=240–244 |
| pages=240–244 |
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| url=https://www.math.uwaterloo.ca/~wgilbert/Research/GilbertNegBases.pdf |
| url=https://www.math.uwaterloo.ca/~wgilbert/Research/GilbertNegBases.pdf |
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| access-date= |
| access-date=2015-02-07 |
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| doi=10.1080/0025570X.1979.11976792 |
| doi=10.1080/0025570X.1979.11976792 |
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| archive-date=2013-11-26 |
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| archive-url=https://web.archive.org/web/20131126105441/http://www.math.uwaterloo.ca/~wgilbert/Research/GilbertNegBases.pdf |
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| dead-url=no |
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}}</ref>。 |
}}</ref>。 |
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负底数可以在不使用负号的情形下表示负数。例如,若''b'' = −10,则该进制下的19对应十进制下的{{nowrap|1 × (−10)<sup>1</sup> + 9 × (−10)<sup>0</sup>}} = −1。 |
负底数可以在不使用负号的情形下表示负数。例如,若''b'' = −10,则该进制下的19对应十进制下的{{nowrap|1 × (−10)<sup>1</sup> + 9 × (−10)<sup>0</sup>}} = −1。 |
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== 注解 == |
== 注解 == |
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{{reflist}} |
{{reflist}} |
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== 参考资料 == |
== 参考资料 == |
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* {{ citation | last1 = McCoy | first1 = Neal H. | title = Introduction To Modern Algebra, Revised Edition | location = Boston | publisher = Allyn and Bacon | year = 1968 | lccn = 68015225 }} |
* {{ citation | last1 = McCoy | first1 = Neal H. | title = Introduction To Modern Algebra, Revised Edition | location = Boston | publisher = Allyn and Bacon | year = 1968 | lccn = 68015225 }} |