·¢¼þÈË: "Guo Congbin" <gu********@sei .buaa.edu.cn>
Ö÷Ìâ: is size_t a keyword?or a macro?
ÈÕÆÚ: 2004Äê6ÔÂ17ÈÕ 23:04
if size_t is a macro, where is the defination? i look it up in the stddef.h,
but i find nothing about size_t.
this is the content of stddef.h of my system,
#ifndef _LINUX_STDDEF_H
#define _LINUX_STDDEF_H
#undef NULL
#if defined(__cplus plus)
#define NULL 0
#else
#define NULL ((void *)0)
#endif
#undef offsetof
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
#endif
i regard the size_t as unsigned int or unsigned long, and i am not very
confidence.
Please help me!
yours Guocongbin
2004.6.17
4  3039 
"Guo Congbin" <gu********@sei .buaa.edu.cn> wrote in message
news:ca******** **@mail.cn99.co m... ·¢¼þÈË: "Guo Congbin" <gu********@sei .buaa.edu.cn>
Ö÷Ìâ: is size_t a keyword?or a macro?
ÈÕÆÚ: 2004Äê6ÔÂ17ÈÕ 23:04
if size_t is a macro, where is the defination? i look it up in the
stddef.h, but i find nothing about size_t.
this is the content of stddef.h of my system,
#ifndef _LINUX_STDDEF_H
#define _LINUX_STDDEF_H
#undef NULL
#if defined(__cplus plus)
#define NULL 0
#else
#define NULL ((void *)0)
#endif
#undef offsetof
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
#endif
i regard the size_t as unsigned int or unsigned long, and i am not very
confidence.
size_t *should* be defined in <stddef.h>, and several other headers,
as a type (with a typedef).
P.J. Plauger
Dinkumware, Ltd. http://www.dinkumware.com
Guo Congbin wrote:
this is the content of stddef.h of my system,
#ifndef _LINUX_STDDEF_H
#define _LINUX_STDDEF_H
That's an internal header, used, I think, when building the Linux
kernel. Look for the stddef.h that comes with your compiler. On my Linux
system it's in /usr/lib/gcc-lib/i386-redhat-linux/2.96/include.
--
Pete Becker
Dinkumware, Ltd. ( http://www.dinkumware.com)
Guo Congbin wrote: ·¢¼þÈË: "Guo Congbin" <gu********@sei .buaa.edu.cn>
Ö÷Ìâ: is size_t a keyword?or a macro?
ÈÕÆÚ: 2004Äê6ÔÂ17ÈÕ 23:04
if size_t is a macro, where is the defination? i look it up in the stddef.h,
but i find nothing about size_t.
this is the content of stddef.h of my system,
#ifndef _LINUX_STDDEF_H
#define _LINUX_STDDEF_H
#undef NULL
#if defined(__cplus plus)
#define NULL 0
#else
#define NULL ((void *)0)
#endif
#undef offsetof
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
#endif
i regard the size_t as unsigned int or unsigned long, and i am not very
confidence.
Please help me!
yours Guocongbin
2004.6.17
In C++ size_t is a typedef of a built in unsigned integral type defined
in <cstddef>.
Best regards,
Ioannis Vranos
Ioannis Vranos wrote: In C++ size_t is a typedef of a built in unsigned integral type
and is
defined
in <cstddef>.
Best regards,
Ioannis Vranos This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
by: Guo Congbin |
last post by:
if size_t is a macro, where is the defination? i look it up in the stddef.h,
but i find nothing about size_t.
this is the content of stddef.h of my system,
#ifndef _LINUX_STDDEF_H
#define _LINUX_STDDEF_H
#undef NULL
#if defined(__cplusplus)
#define NULL 0
|
by: Newbie_sw2003 |
last post by:
Where should I use them?
I am giving you my understandings. Please correct me if I am wrong:
MACRO:
e.g.:#define ref-name 99
The code is substituted by the MACRO ref-name. So no overhead.
Execution is faster. Where will it be stotred?(Is it in bss/stack/?)
FUNCTION:
|
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Hi:
I am a bit new to C programming and am trying to
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|
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Hi all,
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How could we get a macro name from a macro value
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example:
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Hi Everyone,
I was looking at the function prototype of malloc() function in
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void *malloc(size_t size);
so what is size_t is it a pre-defined typedef to int?
Thanks in advance.
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Consider the following program
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{
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