C语言链表添加图书函数: add_book()详解

This function adds a new book to the beginning of a linked list of books. It takes three parameters: a double pointer to the head of the list, an integer ID for the new book, a string name for the new book, and a string author for the new book. The function first allocates memory for a new book using the malloc function, then sets the ID, name, and author fields of the new book based on the parameters passed in. The status field is set to 0 to indicate that the book is not currently borrowed. The next field of the new book is set to the current head of the list, and the head pointer is updated to point to the new book, effectively adding it to the beginning of the list.