char数组的问题 [英] problem with char array
问题描述
我正在阅读The C programming Language一书。我正在尝试做一个
的练习，要求找到最长的一行。我正在阅读
序列中的书，因此我对指针一无所知。
因为字符串是用char声明的string [n]"，长度已经指定了
，如何存储任意长字符串？我已经尝试过
类似
char string [10];
....
char string2 [20];
string = string2;
但它抱怨不兼容的类型。如果我使用二维字符数组，因为它的总长度仍然是固定的。
$ b它也不会工作
$ b感谢您的帮助。
Pashmina
Hi,
I''m reading the book "The C programming Language". I''m trying to do an
exercise asking to find the longest line. I''m reading the book in
sequence hence I shouldn''t know anything about pointer yet.
As a string is declared with "char string[n]", the length is already
specified, how can I store an arbitrary long string? I''ve tried to do
something like
char string[10];
....
char string2[20];
string = string2;
but it complains about incompatible types. And it wouldn''t work either
if I use a 2 dimensional character array as the total length is still
fixed.
Thanks for help.
Pashmina
推荐答案
pa ******* @interfree.it （pashmina g。）写道：
pa*******@interfree.it (pashmina g.) writes:
我正在读这本书; C编程语言。我正在努力做一个要求找到最长线的练习。我正在按顺序阅读这本书，因此我对指针一无所知。
当一个字符串用char string [n]声明时，已经指定了长度，如何存储一个任意长的字符串？
I''m reading the book "The C programming Language". I''m trying to do an
exercise asking to find the longest line. I''m reading the book in
sequence hence I shouldn''t know anything about pointer yet.
As a string is declared with "char string[n]", the length is already
specified, how can I store an arbitrary long string?
我认为你没有指针就可以了。但是，你不需要随时存储
a行，甚至是行的一部分，如果你只想找到
哪行是最长的。
马丁
-
， - 。 Martin Dickopp，德国德累斯顿，=， - _-。 =。
/， - ） http://www.zero -based.org/ （（_ /）oo（\_））
\` - ''` - ''（。）` - ''
` - 。 Debian，GNU操作系统的一种变体。 \ _ /
I don''t think you can without pointers. However, you don''t need to store
a line, or even part of a line, at any time, if you only want to find
out which line is the longest.
Martin
--
,--. Martin Dickopp, Dresden, Germany ,= ,-_-. =.
/ ,- ) http://www.zero-based.org/ ((_/)o o(\_))
\ `-'' `-''(. .)`-''
`-. Debian, a variant of the GNU operating system. \_/
Martin Dickopp写道：
Martin Dickopp wrote:
pa ******* @interfree.it （pashmina g。）写道：
pa*******@interfree.it (pashmina g.) writes:
我正在读这本书 C编程语言。我正在努力做一个要求找到最长线的练习。我正在按顺序阅读这本书，因此我对指针一无所知。
当一个字符串用char string [n]声明时，已经指定了长度，如何存储一个任意长的字符串？
我认为你没有指针就可以了。但是，如果你只想找到哪条线最长的话，你不需要随时存储一条线，甚至是一条线的一部分。
I''m reading the book "The C programming Language". I''m trying to do an
exercise asking to find the longest line. I''m reading the book in
sequence hence I shouldn''t know anything about pointer yet.
As a string is declared with "char string[n]", the length is already
specified, how can I store an arbitrary long string?
I don''t think you can without pointers. However, you don''t need to store
a line, or even part of a line, at any time, if you only want to find
out which line is the longest.
这个技巧可以扩展，这样你就可以翻阅文件两次并打印
最长的一行，而不必存储它的任何部分。
-nrk。
Martin
The trick can be extended, so that you go through the file twice and print
the longest line without having to store any part of it.
-nrk.
Martin
-
删除电子邮件的devnull
--
Remove devnull for email
练习还要求打印出最长行的文本。那些
行是从标准输入读取的，我不知道有什么关于
读取或写入文件。事实上我不知道如何做到这一点
假设我应该只使用前一章中教导的那些东西
（变量和算术表达式，for，symbolic常数，字符
输入/输出，数组，函数和字符数组）。
Pashmina
On Thu ，2004年2月26日13:14:45 +0100
Martin Dickopp< ex **************** @ zero-based.org>写道：
The exercise also asks to print out the text of the longest line. Those
lines are read from standard input, I shouldn''t know anything about
reading nor writing a file yet. In fact I''ve no idea of how to do that
assuming that I should use only those things taught in previous chapter
(variables and arithmetic expressions, for, symbolic constant, character
input/output, array, function and character arrays).
Pashmina
On Thu, 26 Feb 2004 13:14:45 +0100
Martin Dickopp <ex****************@zero-based.org> wrote:
pa ******* @interfree.it （pashmina g。）写道：
pa*******@interfree.it (pashmina g.) writes:
我正在阅读The C programming Language一书。我正在努力做一个要求找到最长线的练习。我正在按顺序阅读这本书，因此我对指针一无所知。
当一个字符串用char string [n]声明时，已经指定了长度，如何存储一个任意长的字符串？
I''m reading the book "The C programming Language". I''m trying to do
an exercise asking to find the longest line. I''m reading the book in
sequence hence I shouldn''t know anything about pointer yet.
As a string is declared with "char string[n]", the length is already
specified, how can I store an arbitrary long string?
我认为你没有指针就可以了。但是，如果您只想知道哪条线路最长，您不需要随时存储线路甚至是线路的一部分。
<马丁
-
， - 。 Martin Dickopp，德国德累斯顿，=，-_-。
=。
/， - ） http://www.zero-based.org/ （（_ /）o
o（\ _））\` - ''
- ''（。）` - ''
` - 。 Debian，GNU操作系统的一种变体。 \ _ /
I don''t think you can without pointers. However, you don''t need to
store a line, or even part of a line, at any time, if you only want to
find out which line is the longest.
Martin
--
,--. Martin Dickopp, Dresden, Germany ,= ,-_-.
=.
/ ,- ) http://www.zero-based.org/ ((_/)o
o(\_))\ `-''
`-''(. .)`-''
`-. Debian, a variant of the GNU operating system. \_/
-
--
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