字符串數組用頭文件初始化，enum包含頭文件

 比較適用於大量參數的數組，下標獲取值（提升代碼效率）

兩個頭文件：

List.h :

//List.h
"aaa",
"bbb",
"ccc",

List2.h

//List2.h
aaa,
bbb,
ccc,

初始化enum:

#ifndef TTT_H_
#define TTT_H_
enum {
#include "List2.h"
    NR_OF_OBJECT_COMMANDS
};
#endif /* TTT_H_ */

main.c:

#include <stdio.h>
#include "ttt.h"
char *objectMnemonic[] = {
#include "List.h"
};
int main()
{
    printf("aaa = %d\n",aaa);  // 枚舉
    printf("NR_OF_OBJECT_COMMANDS = %d\n",NR_OF_OBJECT_COMMANDS); // 枚舉
    printf("objectMnemonic = %s\n",objectMnemonic[1]);   // 字符串數組下標 獲取 字符串
　　 printf("objectMnemonic = %s\n",objectMnemonic[aaa]);  // 下標是枚舉，獲取對應字符串，這才是核心
                                                         // 還可以應用到多個字符串和對應的值（類似c++的map），比如obj[one] = 1；（這個數組可以手動初始化）

    return 0;

}

 gcc 版本 4.4.7 20120313 (Red Hat 4.4.7-4) (GCC)

Console:

aaa = 0
NR_OF_OBJECT_COMMANDS = 3
objectMnemonic = bbb
objectMnemonic = aaa              

疑問１：我把List.h 重命名為List.c   頭文件也包含改為List.c 

不知道為什么報錯：

gcc -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"List.d" -MT"List.d" -o "List.o" "../List.c"
../List.c:2:1: error: expected identifier or ‘(’ before string constant
"aaa",
^
make: *** [List.o] Error 1

疑問２: List2.h 改為　List2.c  也會報錯，不知道為什么。

如下：

gcc -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"List2.d" -MT"List2.d" -o "List2.o" "../List2.c"
../List2.c:2:1: warning: data definition has no type or storage class [enabled by default]
aaa,
^
../List2.c:2:1: warning: type defaults to ‘int’ in declaration of ‘aaa’ [-Wimplicit-int]
../List2.c:3:1: warning: type defaults to ‘int’ in declaration of ‘bbb’ [-Wimplicit-int]
bbb,
^
../List2.c:4:1: warning: type defaults to ‘int’ in declaration of ‘ccc’ [-Wimplicit-int]
ccc,
^
../List2.c:4:1: error: expected identifier or ‘(’ at end of input
make: *** [List2.o] Error 1

歡迎交流，分享。