指针的概念 [英] pointer concept
问题描述
大家好
char * p =" str";
将为此分配多少内存。
Hi All
char *p="str";
How much memory will be allocated for this.
推荐答案
gsingh说：
gsingh said:
大家好
char * p =" str";
将为此分配多少内存。
Hi All
char *p="str";
How much memory will be allocated for this.
字符串文字至少有四个字节，
指针的字节大小为p字节。
-
Richard Heathfield< http://www.cpax.org.uk>
电子邮件：-http：// www。 + rjh @
谷歌用户：< http://www.cpax.org.uk/prg/writings/googly.php>
Usenet是一个奇怪的放置" - dmr 1999年7月29日
At least four bytes for the string literal, and sizeof p bytes for the
pointer.
--
Richard Heathfield <http://www.cpax.org.uk>
Email: -http://www. +rjh@
Google users: <http://www.cpax.org.uk/prg/writings/googly.php>
"Usenet is a strange place" - dmr 29 July 1999
我相信会有4个字节（'s''，'t''，''r''，''\\ \\ 0''）为字符串分配了
，并为指针分配了sizeof（char *）（这将在不同的系统上变化
）（指针的大小，虽然，无事可做
与where.or指的是它所指的是多少空间）
欢呼
10月29日凌晨1点34分，gsingh< gs.alca ... @ gmail.comwrote：
I believe that there will be 4 bytes (''s'', ''t'', ''r'', ''\0'') allocated
for the string, and sizeof(char*) for the pointer (that will vary on
different systems) (the size of the pointer, though, has nothing to do
with where.or how much space the thing it is pointing to is/takes)
cheers
On Oct 29, 1:34 am, gsingh <gs.alca...@gmail.comwrote:
Hi All
char * p =" str";
将为此分配多少内存。
Hi All
char *p="str";
How much memory will be allocated for this.
Richard Heathfield写道：
Richard Heathfield wrote:
gsingh说：
gsingh said:
>大家好
char * p =" str" ;;
将为此分配多少内存。
>Hi All
char *p="str";
How much memory will be allocated for this.
字符串文字至少有4个字节，
指针的字节大小为p字节。
At least four bytes for the string literal, and sizeof p bytes for the
pointer.
为什么至少 ？对齐约束？
sizeof是否包含因对齐而需要的任何字节数？
- Larry
Why "at least" ? Alignment constraints?
Does sizeof include any byte-count required because of alignment?
- Larry
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