多字符字符常量[-Werror，-Wmultichar]

（第43-56行）我試圖爲pset 5實現加載函數。我創建了一個嵌套的while循環，第一個用於迭代，直到文件的結尾和其他直到每個單詞結束。我創建的char * C存放任何「字符串」我是從字典掃描，但是當我編譯多字符字符常量[-Werror，-Wmultichar]

bool load(const char *dictionary) 
{ 
    //create a trie data type 
    typedef struct node 
    { 
     bool is_word; 
     struct node *children[27]; //this is a pointer too! 
    }node; 

    FILE *dptr = fopen(dictionary, "r"); 
    if(dptr == NULL) 
    { 
     printf("Could not open dictionary\n"); 
     unload(); 
     return false; 
    } 

    //create a pointer to the root of the trie and never move this (use traversal *) 
    node *root = malloc(sizeof(node)); 
    char *c = NULL; 

    //scan the file char by char until end and store it in c 
    while(fscanf(dptr,"%s",c) != EOF) 
    { 
     //in the beginning of every word, make a traversal pointer copy of root so we can always refer back to root 
     node *trav = root; 

     //repeat for every word 
     while ((*c) != '/0') 
     { 
     //convert char into array index 
     int alpha = ((*c) - 97); 

     //if array element is pointing to NULL, i.e. it hasn't been open yet, 
     if(trav -> children[alpha] == NULL) 
      { 
      //then create a new node and point it with the previous pointer. 
      node *next_node = malloc(sizeof(node)); 
      trav -> children[alpha] = next_node; 

      //quit if malloc returns null 
      if(next_node == NULL) 
       { 
        printf("Could not open dictionary"); 
        unload(); 
        return false; 
       } 

      } 

     else if (trav -> children[alpha] != NULL) 
      { 
      //if an already existing path, just go to it 
      trav = trav -> children[alpha]; 
      } 
     } 
     //a word is loaded. 
     trav -> is_word = true; 

    } 
}

錯誤：

dictionary.c:52:23: error: multi-character character constant [- 
     Werror,-Wmultichar] 
     while ((*c) != '/0')

我認爲這意味着'/0'應該是單個字符，但我不我不知道我會如何檢查這個詞的結尾！我也收到其他錯誤消息說：

dictionary.c:84:1: error: control may reach end of non-void function [-Werror,-Wreturn-type] 
    }

我一直在玩了一段時間，現在，它是令人沮喪的。請幫助，如果您發現任何其他錯誤，我會很高興！

來源

2017-09-05 jasson

''/ 0'' ---->''\ 0'' – rsp

@rsp或者只是0，沒有引號，沒有混淆。 – cnicutar

或''??/0''（如果你沒有'\'）。 –

你想要'\ 0'（空終止字符）而不是'/ 0'。此外，不要忘記返回一個布爾函數的結尾！

來源

2017-09-05 09:19:26 cydef

謝謝！什麼錯誤 – jasson

@jason Lim：不客氣！ – cydef

多字符字符常量[-Werror，-Wmultichar]

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