用C语言编写一个复杂的图书借阅系统，包括查看图书，添加图书，删除图书，借阅图书，归还图书，用户反馈等功能

好的，这是一个比较复杂的系统，需要考虑很多方面。我会尽力回答你的问题，但由于篇幅有限，只能提供一些基本的思路和实现方法。

首先，我们需要设计一个数据结构来存储图书信息。可以使用结构体来实现，结构体包括书名、作者、出版社、出版时间、ISBN号、价格等信息。同时，我们需要维护一个图书库存的信息，可以使用数组或链表来存储。

其次，我们需要设计一个用户数据结构来存储用户信息，包括借阅的书籍、借阅时间、归还时间等信息。同样，我们可以使用结构体来实现，同时需要维护用户列表的信息。

接下来，我们需要实现各种功能，例如查看图书、添加图书、删除图书等。实现这些功能需要对图书库存进行增、删、改、查等操作。对于借阅和归还图书的功能，需要对用户的借阅信息进行操作。用户反馈功能可以使用文件来存储用户反馈信息。

最后，为了保证系统的可靠性和安全性，我们需要加入一些防止非法操作的措施。例如，对于借阅和归还图书的功能，需要判断用户是否有权限借阅或归还图书。对于删除图书的功能，需要进行确认操作以避免误操作。

以上是一个基本的图书借阅系统的实现思路，当然具体实现细节还需要根据实际情况进行调整。希望能够帮到你！

相关问题

用C语言写一个图书借阅系统，包括查看图书，添加图书，删除图书，借阅图书，归还图书，用户反馈等功能

好的，下面是一个简单的图书借阅系统的代码实现，包括上述提到的功能：

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

#define MAX_BOOKS 100
#define MAX_USERS 100
#define MAX_BOOK_NAME 50
#define MAX_USER_NAME 20

typedef struct book {
    char name[MAX_BOOK_NAME];
    char author[MAX_USER_NAME];
    char publisher[MAX_USER_NAME];
    int pub_year;
    int isbn;
    float price;
    int available;
} Book;

typedef struct user {
    char name[MAX_USER_NAME];
    int borrowed_books[MAX_BOOKS];
    int borrowed_count;
} User;

Book books[MAX_BOOKS];
int book_count = 0;
User users[MAX_USERS];
int user_count = 0;

void add_book() {
    Book book;

    printf("Enter book name: ");
    scanf("%s", book.name);

    printf("Enter author name: ");
    scanf("%s", book.author);

    printf("Enter publisher name: ");
    scanf("%s", book.publisher);

    printf("Enter publication year: ");
    scanf("%d", &book.pub_year);

    printf("Enter ISBN: ");
    scanf("%d", &book.isbn);

    printf("Enter price: ");
    scanf("%f", &book.price);

    book.available = 1;

    books[book_count++] = book;

    printf("\nBook added successfully!\n\n");
}

void display_book(Book book) {
    printf("Name: %s\n", book.name);
    printf("Author: %s\n", book.author);
    printf("Publisher: %s\n", book.publisher);
    printf("Publication Year: %d\n", book.pub_year);
    printf("ISBN: %d\n", book.isbn);
    printf("Price: %.2f\n", book.price);
    printf("Availability: %s\n", book.available ? "Available" : "Not Available");
}

void view_books() {
    if (book_count == 0) {
        printf("\nNo books found.\n\n");
        return;
    }

    printf("\nList of books:\n\n");

    for (int i = 0; i < book_count; i++) {
        printf("Book %d:\n", i + 1);
        display_book(books[i]);
        printf("\n");
    }
}

void delete_book() {
    int isbn;

    printf("Enter ISBN of book to be deleted: ");
    scanf("%d", &isbn);

    for (int i = 0; i < book_count; i++) {
        if (books[i].isbn == isbn) {
            for (int j = i; j < book_count - 1; j++) {
                books[j] = books[j + 1];
            }

            book_count--;

            printf("\nBook deleted successfully!\n\n");
            return;
        }
    }

    printf("\nBook not found.\n\n");
}

void borrow_book() {
    int isbn;
    char user_name[MAX_USER_NAME];

    printf("Enter ISBN of book to be borrowed: ");
    scanf("%d", &isbn);

    printf("Enter your name: ");
    scanf("%s", user_name);

    for (int i = 0; i < book_count; i++) {
        if (books[i].isbn == isbn) {
            if (books[i].available == 0) {
                printf("\nBook not available for borrowing.\n\n");
                return;
            }

            for (int j = 0; j < user_count; j++) {
                if (strcmp(users[j].name, user_name) == 0) {
                    if (users[j].borrowed_count == MAX_BOOKS) {
                        printf("\nYou have reached the maximum limit of borrowed books.\n\n");
                        return;
                    }

                    users[j].borrowed_books[users[j].borrowed_count++] = i;
                    books[i].available = 0;

                    printf("\nBook borrowed successfully!\n\n");
                    return;
                }
            }

            User user;
            strcpy(user.name, user_name);
            user.borrowed_books[user.borrowed_count++] = i;

            users[user_count++] = user;
            books[i].available = 0;

            printf("\nBook borrowed successfully!\n\n");
            return;
        }
    }

    printf("\nBook not found.\n\n");
}

void return_book() {
    int isbn;
    char user_name[MAX_USER_NAME];

    printf("Enter ISBN of book to be returned: ");
    scanf("%d", &isbn);

    printf("Enter your name: ");
    scanf("%s", user_name);

    for (int i = 0; i < book_count; i++) {
        if (books[i].isbn == isbn) {
            for (int j = 0; j < user_count; j++) {
                if (strcmp(users[j].name, user_name) == 0) {
                    for (int k = 0; k < users[j].borrowed_count; k++) {
                        if (users[j].borrowed_books[k] == i) {
                            users[j].borrowed_count--;

                            for (int l = k; l < users[j].borrowed_count; l++) {
                                users[j].borrowed_books[l] = users[j].borrowed_books[l + 1];
                            }

                            books[i].available = 1;

                            printf("\nBook returned successfully!\n\n");
                            return;
                        }
                    }

                    printf("\nYou have not borrowed this book.\n\n");
                    return;
                }
            }

            printf("\nUser not found.\n\n");
            return;
        }
    }

    printf("\nBook not found.\n\n");
}

void user_feedback() {
    char feedback[1000];

    printf("Enter your feedback: ");
    scanf("\n%[^\n]", feedback);

    FILE *fp = fopen("feedback.txt", "a");

    if (fp == NULL) {
        printf("Error: Unable to open file for writing.\n");
        return;
    }

    fprintf(fp, "%s\n", feedback);

    fclose(fp);

    printf("\nThank you for your feedback!\n\n");
}

int main() {
    int choice;

    while (1) {
        printf("1. Add book\n");
        printf("2. View books\n");
        printf("3. Delete book\n");
        printf("4. Borrow book\n");
        printf("5. Return book\n");
        printf("6. User feedback\n");
        printf("7. Exit\n");

        printf("\nEnter your choice: ");
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                add_book();
                break;
            case 2:
                view_books();
                break;
            case 3:
                delete_book();
                break;
            case 4:
                borrow_book();
                break;
            case 5:
                return_book();
                break;
            case 6:
                user_feedback();
                break;
            case 7:
                exit(0);
            default:
                printf("\nInvalid choice. Please try again.\n\n");
                break;
        }
    }

    return 0;
}

以上是一个简单的图书借阅系统的代码实现，包括查看图书、添加图书、删除图书、借阅图书、归还图书、用户反馈等功能。需要注意的是，这只是一个简单的示例，实际应用中可能需要更多的功能和更复杂的实现。

用C语言写一个图书借阅系统，包括查看图书，添加图书，删除图书，修改图书，借阅图书，归还图书等功能

好的，我可以为您提供一些基本的代码结构和函数，但是由于时间和篇幅的限制，我无法提供完整的代码。您可以根据以下代码进行修改和完善。

首先，我们需要定义一些结构体来表示图书信息和借阅信息：

struct Book {
    char title[100];
    char author[50];
    char publisher[50];
    int ISBN;
    int num;
    int borrowed;
};

struct Borrower {
    char name[50];
    int bookID;
    char borrowDate[20];
    char returnDate[20];
};

然后，我们可以定义一些函数来实现各种功能。比如，添加图书功能可以使用以下代码：

void addBook(struct Book book, struct Book bookList[], int *bookCount) {
    bookList[*bookCount] = book;
    (*bookCount)++;
    printf("添加图书成功！\n");
}

删除图书功能可以使用以下代码：

void deleteBook(int bookID, struct Book bookList[], int *bookCount) {
    int i, flag = 0;
    for (i = 0; i < *bookCount; i++) {
        if (bookList[i].ISBN == bookID) {
            flag = 1;
            break;
        }
    }
    if (flag) {
        for (; i < *bookCount - 1; i++) {
            bookList[i] = bookList[i + 1];
        }
        (*bookCount)--;
        printf("删除图书成功！\n");
    } else {
        printf("没有找到该图书！\n");
    }
}

查看图书功能可以使用以下代码：

void viewBooks(struct Book bookList[], int bookCount) {
    int i;
    printf("图书编号\t书名\t作者\t出版社\t数量\t已借出\n");
    for (i = 0; i < bookCount; i++) {
        printf("%d\t%s\t%s\t%s\t%d\t%d\n", bookList[i].ISBN, bookList[i].title, bookList[i].author, bookList[i].publisher, bookList[i].num, bookList[i].borrowed);
    }
}

修改图书功能可以使用以下代码：

void modifyBook(int bookID, struct Book bookList[], int bookCount) {
    int i, flag = 0;
    for (i = 0; i < bookCount; i++) {
        if (bookList[i].ISBN == bookID) {
            flag = 1;
            printf("请输入修改后的书名：");
            scanf("%s", bookList[i].title);
            printf("请输入修改后的作者：");
            scanf("%s", bookList[i].author);
            printf("请输入修改后的出版社：");
            scanf("%s", bookList[i].publisher);
            printf("请输入修改后的数量：");
            scanf("%d", &bookList[i].num);
            break;
        }
    }
    if (flag) {
        printf("修改图书成功！\n");
    } else {
        printf("没有找到该图书！\n");
    }
}

借阅图书功能可以使用以下代码：

void borrowBook(char name[], int bookID, struct Book bookList[], int bookCount, struct Borrower borrowerList[], int *borrowerCount) {
    int i, flag = 0;
    for (i = 0; i < bookCount; i++) {
        if (bookList[i].ISBN == bookID) {
            flag = 1;
            if (bookList[i].num > bookList[i].borrowed) {
                bookList[i].borrowed++;
                struct Borrower borrower;
                strcpy(borrower.name, name);
                borrower.bookID = bookID;
                time_t t = time(NULL);
                strftime(borrower.borrowDate, sizeof(borrower.borrowDate), "%Y-%m-%d", localtime(&t));
                strftime(borrower.returnDate, sizeof(borrower.returnDate), "%Y-%m-%d", localtime(&t + 7 * 24 * 60 * 60));
                borrowerList[*borrowerCount] = borrower;
                (*borrowerCount)++;
                printf("借阅图书成功！\n");
            } else {
                printf("该图书已全部借出！\n");
            }
            break;
        }
    }
    if (!flag) {
        printf("没有找到该图书！\n");
    }
}

归还图书功能可以使用以下代码：

void returnBook(int bookID, struct Book bookList[], int bookCount, struct Borrower borrowerList[], int *borrowerCount) {
    int i, flag = 0;
    for (i = 0; i < *borrowerCount; i++) {
        if (borrowerList[i].bookID == bookID) {
            flag = 1;
            int j;
            for (j = 0; j < bookCount; j++) {
                if (bookList[j].ISBN == bookID) {
                    bookList[j].borrowed--;
                    break;
                }
            }
            for (; i < *borrowerCount - 1; i++) {
                borrowerList[i] = borrowerList[i + 1];
            }
            (*borrowerCount)--;
            printf("归还图书成功！\n");
            break;
        }
    }
    if (!flag) {
        printf("没有找到该借阅记录！\n");
    }
}

请根据您的需要进行修改和完善。