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define a string

QQ
How to define a string?

Usually we can

#define MAX 30

However if I'd like to define a string const
can I?
#define S "Hello"

seems not working

Thanks

Nov 14 '05 #1
3 36384
In article <11************ **********@o13g 2000cwo.googleg roups.com>,
QQ <ju****@yahoo.c om> wrote:
How to define a string? Usually we can #define MAX 30 However if I'd like to define a string const
can I?
#define S "Hello" seems not working


What difficulty are you having with it? Can you present a -short- program
showing what you are trying to do but which isn't working?
--
Any sufficiently advanced bug is indistinguishab le from a feature.
-- Rich Kulawiec
Nov 14 '05 #2
QQ wrote:
How to define a string?

Usually we can

#define MAX 30

However if I'd like to define a string const
can I?
#define S "Hello"

seems not working

Thanks


Just remember that the #define is a substitution
that takes place before the translation phase.

So, when using the #define, try getting the syntax
correct first:

/* First try with this syntax */
const char * S = "Hello";

/* Then move it to a #define: */
#define S (const char *)("Hello")

{Although literal strings are constants.}

--
Thomas Matthews

C++ newsgroup welcome message:
http://www.slack.net/~shiva/welcome.txt
C++ Faq: http://www.parashift.com/c++-faq-lite
C Faq: http://www.eskimo.com/~scs/c-faq/top.html
alt.comp.lang.l earn.c-c++ faq:
http://www.comeaucomputing.com/learn/faq/
Other sites:
http://www.josuttis.com -- C++ STL Library book
http://www.sgi.com/tech/stl -- Standard Template Library

Nov 14 '05 #3
QQ wrote:
How to define a string?

Usually we can

#define MAX 30

However if I'd like to define a string const
can I?
#define S "Hello"

seems not working

Thanks


#include <stdio.h>
#define S "Hello"
int main(void) {
puts(S);
return 0;
}

It's 'working' here.

--
Joe Wright
"Everything should be made as simple as possible, but not simpler."
--- Albert Einstein ---
Nov 14 '05 #4

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