C - 初始化數組成員結構時出錯

-5

我想初始化一個我已經做過的結構，但是出現錯誤，我無法理解造成它們的原因。我正在使用ANSI C標誌工作在GCC上。C - 初始化數組成員結構時出錯

如果有人能幫助我理解問題所在，我將非常感謝！

typedef struct _inst { 
    const char *name[NUM_OF_INSTRUCTIONS]; 
    int codes[NUM_OF_INSTRUCTIONS]; 
    int validParam[NUM_OF_INSTRUCTIONS];  
} instructions; 


instructions instructionsData; 

instructionsData.name[] = {"mov", "cmp", "add", "sub", "not", "clr", "lea", "inc", "dec", "jmp", "bne", "red", "prn", "jsr", "rts", "stop"}; 
instructionsData.codes[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}; 
instructionsData.validParam[] = {2, 2, 2, 2, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 0, 0};

，我從GCC得到錯誤是：

dataStructs.h:47:17: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘.’ token 
instructionsData.name[] = {"mov", "cmp", "add", "sub", "not", "clr", "lea", "inc", "dec", "jmp", "bne", "red", "prn", "jsr", "rts", "stop"}; 
       ^
dataStructs.h:47:140: warning: ISO C does not allow extra ‘;’ outside of a function [-Wpedantic] 
instructionsData.name[] = {"mov", "cmp", "add", "sub", "not", "clr", "lea", "inc", "dec", "jmp", "bne", "red", "prn", "jsr", "rts", "stop"}; 
                                      ^
dataStructs.h:48:17: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘.’ token 
instructionsData.codes[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}; 
       ^
dataStructs.h:48:82: warning: ISO C does not allow extra ‘;’ outside of a function [-Wpedantic] 
instructionsData.codes[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}; 
                       ^
dataStructs.h:49:17: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘.’ token 
instructionsData.validParam[] = {2, 2, 2, 2, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 0, 0}; 
       ^
dataStructs.h:49:81: warning: ISO C does not allow extra ‘;’ outside of a function [-Wpedantic] 
instructionsData.validParam[] = {2, 2, 2, 2, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 0, 0};

來源

2017-08-21 CrazyPhrog

您能否複製粘貼代碼並且不要發佈屏幕截圖？ –

dupe？ https://stackoverflow.com/a/41510479/2173917 –

@SouravGhosh雖然解決方案是相同的，我認爲問題是不同的。不是一個愚蠢的？ –

你在做什麼是一個賦值後初始化。你不能像這樣分配數組。

什麼可以代替做的是 -

instructions instructionData = {{"mov", "cmp" ... }, {0, 1, 2, ... }, {2, 2 ,2 ... }};

這將初始化整個結構的定義。

同時，如果你的結構有哪些你沒有初始值等領域，可以使用指定的初始化 -

instructions instructionData = {.codes={0, 1, 2, ... }};

這初始化所有其他字段的默認初始值相應的類型，如NULL爲指針，0爲整數等

如果你絕對要指定單獨的非標量場後的初始化，您可以使用memcpy作爲

memcpy(instructionData.name, &({"mov", "cmp" ... }), sizeof(({"mov", "cmp" ... })));

您也可以使用sizeof (instructionData.name)，但是您必須確保您的初始化程序至少與字段一樣長。

來源

2017-08-21 11:16:33

你很害怕*？ ;） –

@FelixPalmen我很確定*;） –

謝謝，現在正在編譯！但我仍然不明白是什麼問題... – CrazyPhrog

C - 初始化數組成員結構時出錯

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