尝试将用户输入分配给结构中的元素，但不断出现分段错误 11

Question

struct Book {
    char *title; 
    char *authors; 
    unsigned int year; 
    unsigned int copies; 
};

void book_to_add()
{
    struct Book book;
    struct Book *ptrbook = (struct Book*) malloc(sizeof(struct Book));

    printf("Book you would like to add: \n");
    scanf("%[^\n]", book.title);

    printf("Author of Book: \n");
    scanf("%[^\n]", book.authors);

    printf("Year book was published: \n");
    scanf("%u", &book.year);

    printf("number of copies: \n ");
    scanf("%u", &book.copies);

    add_book(book);
    free(ptrbook);
}

我是编程新手，我不确定我应该怎么做才能解决这个问题，我知道这可能与结构中的指针元素有关。

Answer 1

title和authors是未初始化的指针，你需要为它们分配内存（即让它们指向一些有效的内存位置）如果你想在那里存储任何东西，例如:

book.authors = malloc(100);
book.authors = malloc(100);

对于能够存储 99 个字符 + 空终止符的缓冲区 '[=14=]'。

请注意，请确保在 scanf 中使用大小分隔符，否则可能会出现缓冲区溢出，e.g:

scanf(" %99[^\n]", book.title);
scanf(" %99[^\n]", book.authors);

对于 100 个字符的缓冲区。

尝试将用户输入分配给结构中的元素，但不断出现分段错误 11

Trying to assign user input to elements in a struct but keep getting segmentation-fault 11

c

malloc

struct

pointers

segmentation-fault