这个宏有什么问题 [英] what's wrong with the macro
问题描述
#include< stdio.h>
#include< stdlib.h>
#include< string.h>
#define SECONDS_PER_YEAR(60 * 60 * 24 * 365)UL
int main()
{
unsigned long int u_i = SECONDS_PER_YEAR;
printf("%lu \ n",u_i);
返回0;
}
cc -g -c -Wall -std = c99 -DDEBUG define.c
define.c:在函数''main'':
define.c:17:错误:预期'',''或'';''在''UL'之前'
make:*** [define.o ]错误1
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define SECONDS_PER_YEAR (60*60*24*365)UL
int main()
{
unsigned long int u_i = SECONDS_PER_YEAR;
printf("%lu\n",u_i);
return 0;
}
cc -g -c -Wall -std=c99 -DDEBUG define.c
define.c: In function ''main'':
define.c:17: error: expected '','' or '';'' before ''UL''
make: *** [define.o] error 1
推荐答案
限定符必须直接跟随数字。
-
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" DaVinci" < ap *********** @ gmail.comwrote in message
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The qualifer must follow the digits directly.
--
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"DaVinci" <ap***********@gmail.comwrote in message
news:11*********************@m73g2000cwd.googlegro ups.com...
>
#include< stdio.h>
#include< stdlib.h>
#include< string.h>
#define SECONDS_PER_YEAR(60 * 60 * 24 * 365)UL
int main()
{
unsigned long int u_i = SECONDS_PER_YEAR;
printf("%lu \ n",u_i);
返回0;
}
cc -g -c -Wall -std = c99 -DDEBUG define.c
define.c:在函数''main'':
define.c:17:error:expected'',''或' ''''在''UL'之前'
make:*** [define.o]错误1
>
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define SECONDS_PER_YEAR (60*60*24*365)UL
int main()
{
unsigned long int u_i = SECONDS_PER_YEAR;
printf("%lu\n",u_i);
return 0;
}
cc -g -c -Wall -std=c99 -DDEBUG define.c
define.c: In function ''main'':
define.c:17: error: expected '','' or '';'' before ''UL''
make: *** [define.o] error 1
Malcolm发布:
Malcolm posted:
qualifer必须直接跟随数字。
The qualifer must follow the digits directly.
可以简单地改为:
#define SECONDS_PER_YEAR(60LU * 60 * 24 * 365)>
-
Frederick Gotham
It can be changed to simply:
#define SECONDS_PER_YEAR(60LU*60*24*365)
--
Frederick Gotham
" Frederick Gotham < fg ******* @ SPAM.comha scritto nel messaggio
新闻:Vf ******************* @ news。 indigo.ie ...
"Frederick Gotham" <fg*******@SPAM.comha scritto nel messaggio
news:Vf*******************@news.indigo.ie...
Malcolm发布:
Malcolm posted:
资格者必须直接跟随数字。
The qualifer must follow the digits directly.
可以简单地改为:
#define SECONDS_PER_YEAR(60LU * 60 * 24 * 365)>
需要空间
#define SECONDS_PER_YEAR(60LU * 60 * 24 * 365)
- -
Giorgio Silvestri
DSP /嵌入式/实时操作系统软件工程师
A space is necessary
#define SECONDS_PER_YEAR (60LU*60*24*365)
--
Giorgio Silvestri
DSP/Embedded/Real Time OS Software Engineer
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