如何以正确的方式定义字符串？
我正在重新创建诸如Shell之类的基本bash，并且使用getCWD来确定我目前要以一种不错的方式打印它的路径。
我的标题文件中有一个：
#define BLUE "\e[1;36m"
#define WHITE "\e[0;00m"
#define PWD getcwd((NULL), 0)
#define PROMPT BLUE PWD WHITE
然后，我尝试使用putStr打印提示，但是当我编译时，我会收到此错误：
cc -g3 -c -o src/minishell.o src/minishell.c
In file included from src/minishell.c:9:
src/minishell.c: In function ‘minishell’:
src/../include/minishell2.h:14:13: error: expected ‘)’ before ‘getcwd’
14 | #define PWD getcwd((NULL), 0)
| ^~~~~~
src/../include/minishell2.h:15:21: note: in expansion of macro ‘PWD’
15 | #define PROMPT BLUE PWD WHITE
| ^~~
src/minishell.c:36:15: note: in expansion of macro ‘PROMPT’
36 | my_putstr(PROMPT);
| ^~~~~~
src/minishell.c:36:14: note: to match this ‘(’
36 | my_putstr(PROMPT);
| ^
make: *** [<builtin>: src/minishell.o] Error 1
我会喜欢如何定义字符串并打印它同样，我调用任何其他字符串，但请使用我设置的颜色变量，并使用blue和white 谢谢！
I am recreating a basic bash like shell and I use getcwd for determining the path I am currently in to print it in a nice way.
I have this in my header file:
#define BLUE "\e[1;36m"
#define WHITE "\e[0;00m"
#define PWD getcwd((NULL), 0)
#define PROMPT BLUE PWD WHITE
Then, I try to print PROMPT using a putstr but when I compile I get this error:
cc -g3 -c -o src/minishell.o src/minishell.c
In file included from src/minishell.c:9:
src/minishell.c: In function ‘minishell’:
src/../include/minishell2.h:14:13: error: expected ‘)’ before ‘getcwd’
14 | #define PWD getcwd((NULL), 0)
| ^~~~~~
src/../include/minishell2.h:15:21: note: in expansion of macro ‘PWD’
15 | #define PROMPT BLUE PWD WHITE
| ^~~
src/minishell.c:36:15: note: in expansion of macro ‘PROMPT’
36 | my_putstr(PROMPT);
| ^~~~~~
src/minishell.c:36:14: note: to match this ‘(’
36 | my_putstr(PROMPT);
| ^
make: *** [<builtin>: src/minishell.o] Error 1
I would love some help on how I can define a string and print it the same way I call any other string but use the color variables I have set with BLUE and WHITE
Thanks!
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蓝色PWD白色会使字符串连接。那将行不通。汇编过程中相邻的字符串文字是串联的；“ ABC”“ DEF”将成为“ ABCDEF”。但是pwd不是字符串文字；它是getCWD（（NULL），0）。getCWD例程在运行时返回字符串。您不能以这种方式连接它。最简单的解决方案可能是为my_putstr编写三个单独的调用，一个用于blue，一个用于pwd，一个用于White < /代码>。另外，您需要编写其他代码来连接字符串。It looks like you expect
BLUE PWD WHITEto concatenate the strings. That will not work. Adjacent string literals are concatenated during compilation;"abc" "def"will become"abcdef". ButPWDis not a string literal; it isgetcwd((NULL), 0). Thegetcwdroutine returns a string at run-time. You cannot concatenate it that way. The easiest solution may be to write three separate calls tomy_putstr, one forBLUE, one forPWD, and one forWHITE. Alternatively, you need to write additional code to concatenate strings.