我这个释放空间的写法对吗

typedef struct Account
{
        char cardNum[17];
        char password[7];
        char userName[10];
        char balance[20];
        struct Account* next;
}LIST;
LIST* head=NULL;
LIST* p = NULL;


void initialize() {
        FILE* fp;
        LIST* tail,*temp;
        head = (LIST*)malloc(sizeof(LIST));
        tail = head;
        p = head;

        if ((fp = fopen("D:\\华软2021-2022\\c2\\ATM模拟机\\accounts.txt", "r")) == NULL) {
                printf("文件打开错误");
                exit(0);
        }

        while (1) {
                temp = (LIST*)malloc(sizeof(LIST));
                fscanf(fp, "%s\t%s\t%s\t%s\n", temp->cardNum, temp->password, temp->userName, temp->balance);
                temp->next = NULL;
                tail->next = temp;
                tail = temp;
                if (feof(fp)) {
                        break;
                }
        }
        fclose(fp);
}


//释放空间
void freeSpace() {
        LIST* temp = p->next;
        while (temp!=NULL) {
                p = temp->next;
                free(temp);
                temp = p;
        }
}

供参考：

//释放空间
void freeSpace(LIST* head) {

    while (head != NULL) {
        LIST* temp = head;
        head = head->next;
        free(temp);
        //temp = p;
    }
    head = NULL;
}

你这样写没有释放头节点，而且P的赋值在另外一个函数里面，这样不安全。