基于链表的图书信息管理系统c语言代码，至少包括ISBN，书名与定价，实现插入，删除，修改，查找和计数功能

好的，我可以回答这个问题。以下是基于链表的图书信息管理系统C语言代码的示例：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

typedef struct book {
    char isbn[20];
    char title[50];
    float price;
    struct book* next;
} Book;

Book* head = NULL;

void insertBook(char isbn[], char title[], float price) {
    Book* new_book = (Book*) malloc(sizeof(Book));
    strcpy(new_book->isbn, isbn);
    strcpy(new_book->title, title);
    new_book->price = price;
    new_book->next = head;
    head = new_book;
}

void deleteBook(char isbn[]) {
    Book* current_book = head;
    Book* previous_book = NULL;
    while (current_book != NULL) {
        if (strcmp(current_book->isbn, isbn) == 0) {
            if (previous_book == NULL) {
                head = current_book->next;
            } else {
                previous_book->next = current_book->next;
            }
            free(current_book);
            return;
        }
        previous_book = current_book;
        current_book = current_book->next;
    }
}

void modifyBook(char isbn[], char title[], float price) {
    Book* current_book = head;
    while (current_book != NULL) {
        if (strcmp(current_book->isbn, isbn) == 0) {
            strcpy(current_book->title, title);
            current_book->price = price;
            return;
        }
        current_book = current_book->next;
    }
}

void searchBook(char isbn[]) {
    Book* current_book = head;
    while (current_book != NULL) {
        if (strcmp(current_book->isbn, isbn) == 0) {
            printf("ISBN: %s\n", current_book->isbn);
            printf("Title: %s\n", current_book->title);
            printf("Price: %.2f\n", current_book->price);
            return;
        }
        current_book = current_book->next;
    }
    printf("Book not found.\n");
}

void countBooks() {
    int count = 0;
    Book* current_book = head;
    while (current_book != NULL) {
        count++;
        current_book = current_book->next;
    }
    printf("Number of books: %d\n", count);
}

int main() {
    insertBook("9780131103627", "The C Programming Language", 52.99);
    insertBook("9780132353849", "Effective C++", 35.99);
    insertBook("9780201634604", "Design Patterns", 56.99);

    searchBook("9780201634604"); // should print information about Design Patterns

    deleteBook("9780131103627");

    modifyBook("9780132353849", "Effective C++ (3rd edition)", 42.99);

    countBooks(); // should print "Number of books: 2"

    return 0;
}

希望对你有所帮助！如果你有任何其他问题，请继续提问。