C中的Valgrind内存测试错误。内存泄漏问题

Question

老实说，我不知道该如何解释，但我的代码中存在内存泄漏。该代码通过了除此测试之外的所有测试。该函数是一个卸载函数，从内存中卸载字典。

// Unloads dictionary from memory, returning true if successful else false
bool unload(void)
{
    for ( int i = 0 ; i < N ; i++)
    {
        node *head = table[i];
        node *cursor = head;
        node *tmp = head;
        
        while(cursor != NULL)
        {
            cursor = cursor->next;
            free(tmp);
            tmp = cursor;
        }
    }
    return true;
}

此函数加载词典：

// Loads dictionary into memory, returning true if successful else false
bool load(const char *dictionary)
{
    char word[LENGTH + 1];
    FILE *file = fopen(dictionary,"r");
    if (file == NULL) return false;
    
    while (fscanf(file,"%s",word) != EOF)
    {
        node *n = malloc(sizeof(node));
        if (n == NULL) return false;
        strcpy(n->word,word);
        n->next = NULL;
        
        int hash_index = hash(word);
        if (table[hash_index] == NULL)
        {
            table[hash_index] = n;
        }
        else 
        {
            n->next = table[hash_index];
            table[hash_index] = n;
        }
        total++;
    }
    return true;
}

如有任何帮助，我们将不胜感激！

Answer 1

原来是忘记关闭文件了！

// Loads dictionary into memory, returning true if successful else false
bool load(const char *dictionary)
{
    char word[LENGTH + 1];
    FILE *file = fopen(dictionary,"r");
    if (file == NULL) return false;
    
    while (fscanf(file,"%s",word) != EOF)
    {
        node *n = malloc(sizeof(node));
        if (n == NULL) return false;
        strcpy(n->word,word);
        n->next = NULL;
        
        int hash_index = hash(word);
        if (table[hash_index] == NULL)
        {
            table[hash_index] = n;
        }
        else 
        {
            n->next = table[hash_index];
            table[hash_index] = n;
        }
        total++;
    }
    fclose(file);
    return true;
}

C中的Valgrind内存测试错误。内存泄漏问题

Valgrind memory test error in C. Memory leak issue

c

hashtable

data-structures

cs50