C语言 尝试将用户输入分配给结构中的元素，但一直得到分段错误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);
}

我对编程很陌生，我不确定我应该怎么做来解决这个问题，我知道它可能与结构体中的指针元素有关。

Answer 1

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

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

表示能够存储99个字符+空结束符''的缓冲区。

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在这一点上，确保在scanf中使用大小分隔符，否则有缓冲区溢出的机会，例如:

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

表示100个字符的缓冲区。