Question

Noob，试图弄清楚如何在一个简单的哈希表（已给出）中插入1个单词。这个词是小写的。但是，出现以下错误：

""exit status 1
main.c:30:40: error: function definition is not allowed here
    unsigned int hash(const char *word){""

#include <ctype.h>
#include <stdbool.h>
#include <stdio.h>

int main(void) {
    int N = 26;
    // Length = 45;

    // Represents a node in a hash table
    typedef struct node
    {
        // LENGTH is defined in dictionary.h as 45, max length
        char word[45+1];
        struct node *next;
    }
    node;

    // Represents a hash table, N is defined as 26 above
    node *hashtable[N];

    // Initialize hash table
    for (int i = 0; i < N; i++)
    {
        hashtable[i] = NULL;
    }

    char *word = "jello";

    // Hashes word to a number between 0 (a) and 25 (z), inclusive, based on its first letter, creating 26 buckets, or alphabetized categories

    unsigned int hash(const char *word){
        return tolower(word[0]) - 'a';
    }

    int x = word[0] - 'a';

    printf("%d\n", x);
    printf("%s\n", word);
    printf("%c\n", word[0]);

    return 0;
}

Answer 1

正如错误消息所暗示的，您正在不应该定义的地方定义函数-在这种情况下，是在main函数内部。将其移到那里就可以了。

如何将单词插入简单的哈希函数C

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