大数转换，ASCII到二进制 [英] Large number conversion, ASCII to binary
问题描述
我正在尝试编写一个函数，它将一个大的ascii
数字，比如100个ascii数字转换为它的二进制表示。似乎我想要的evey算法是倒退的。 Normaly在
笔和纸张ascii到二进制转换之后，将从
开始减去可从给定的
数中减去的最大2的幂并且从左到右工作以1s和0s填充记忆。
在我的情况下，我真的不能做那个b / c 2的最大功率
适合我试图转换的数字太大，即使对于
64位int。
任何帮助，建议，示例代码都会大大降低。
ets假设我有一个char类型的数组，其中evey元素的值等于ascii数字中下一个数字的值。
非常感谢
I am trying to write a function which will convert a large ascii
number, say 100 ascii digits, to its binary representation. It seems
that evey algorithm I am trying to think of is backwards. Normaly in
pen and paper ascii to binary conversion one would start by
subtracting largest power of 2 that can be subtracted from the given
number and work from left to right filling memory up with 1s and 0s.
In my case I cant really do that b/c the largest power of 2 which
would fit into a number i am trying to convert is too large even for
64 bit int.
Any help, suggestions, sample code would be greatly apreciated.
ets assume I have an array of char type, evey element of which has a
value equal to the value of next digit in ascii number.
Thanks ahead
推荐答案
On Sun，2008年7月13日17:52:13 -0700（PDT），fermineutron
< fr ********** @ yahoo.comwrote：
On Sun, 13 Jul 2008 17:52:13 -0700 (PDT), fermineutron
<fr**********@yahoo.comwrote:
>我正在尝试编写一个函数这将转换一个大的ascii
数字，比如说100个ascii数字它的二进制表示。似乎我试图想到的evey算法是倒退的。 Normaly在
笔和纸ascii到二进制转换中，首先要减去可以从给定的
数中减去的2的最大幂，并从左到右填充内存以1s和0s。
在我的情况下，我真的不能做那个b / c 2的最大功率
适合我试图转换的数字太大，即使对于
64位int。
任何帮助，建议，示例代码都会有很大的偏见。
假设我有一个char类型的数组，evey元素的值等于
到ascii数字的下一个数字的值。
>I am trying to write a function which will convert a large ascii
number, say 100 ascii digits, to its binary representation. It seems
that evey algorithm I am trying to think of is backwards. Normaly in
pen and paper ascii to binary conversion one would start by
subtracting largest power of 2 that can be subtracted from the given
number and work from left to right filling memory up with 1s and 0s.
In my case I cant really do that b/c the largest power of 2 which
would fit into a number i am trying to convert is too large even for
64 bit int.
Any help, suggestions, sample code would be greatly apreciated.
ets assume I have an array of char type, evey element of which has a
value equal to the value of next digit in ascii number.
任何大数字图书馆应该提供您需要的工具。我赞成理查德希思菲尔德喜欢clint的bignum部分但是b
可能是因为它是我学过的唯一一个。
删除del电子邮件
Any of the "big number" libraries should provide the tools you need. I
happen to like the bignum part of clint by Richard Heathfield but that
may be because it''s the only one I''ve studied.
Remove del for email
fermineutron< fr ********** @ yahoo.comwrites：
fermineutron <fr**********@yahoo.comwrites:
我正在尝试编写一个函数，它将一个大的ascii
数字，比如100个ascii数字转换为它的二进制表示。
I am trying to write a function which will convert a large ascii
number, say 100 ascii digits, to its binary representation.
家庭作业？如果没有，请使用bignum库（最终将支付）。如果
这是家庭作业，如果你告诉我你的话，我会告诉你我的...
-
Ben。
Homework? If not, use a bignum library (it will pay eventually). If
it is homework, I''ll show you mine if you show me yours...
--
Ben.
7月14日，5：52 * am，fermineutron< free4tram ... @ yahoo.comwrote：
如果您的问题与某些生产代码有关，那么最好不要重新发明轮子并使用现有的库。如果用于
教学目的，你应该发布你的方法。
On Jul 14, 5:52*am, fermineutron <free4tram...@yahoo.comwrote:
If your problem is regarding some production code, then it''s better
not to re-invent the wheel and use some existing library. If it is for
pedagogical purpose, you ought to post your approach.
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