写一个图书信息管理系统C语言代码，要求：1. 图书信息的浏览: 可打开数据文件，查看每本图书的图书条形码、书名、作者名、出版社、出版时间、定价、馆藏数量等。

下面是一个简单的图书信息管理系统的 C 语言代码示例。该程序可以打开一个数据文件，允许用户查看每本书的信息并进行一些简单的操作，如添加新书、删除书籍等。

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

#define MAX_LEN 50

// 定义图书结构体
typedef struct {
    char barcode[MAX_LEN];
    char title[MAX_LEN];
    char author[MAX_LEN];
    char publisher[MAX_LEN];
    char publish_date[MAX_LEN];
    float price;
    int count;
} Book;

// 声明函数
void show_menu();
void show_books(Book* books, int count);
void add_book(Book* books, int* count);
void delete_book(Book* books, int* count);
void save_books(Book* books, int count);
void load_books(Book* books, int* count);

int main() {
    Book books[100];
    int count = 0;
    int choice;
    load_books(books, &count);
    do {
        show_menu();
        scanf("%d", &choice);
        switch (choice) {
            case 1:
                show_books(books, count);
                break;
            case 2:
                add_book(books, &count);
                break;
            case 3:
                delete_book(books, &count);
                break;
            case 4:
                save_books(books, count);
                break;
            case 5:
                printf("Goodbye!\n");
                break;
            default:
                printf("Invalid choice!\n");
                break;
        }
    } while (choice != 5);

    return 0;
}

// 显示菜单
void show_menu() {
    printf("\n");
    printf("1. Show books\n");
    printf("2. Add book\n");
    printf("3. Delete book\n");
    printf("4. Save books\n");
    printf("5. Quit\n");
    printf("Enter your choice: ");
}

// 显示所有书籍信息
void show_books(Book* books, int count) {
    printf("Barcode\tTitle\tAuthor\tPublisher\tPublish Date\tPrice\tCount\n");
    for (int i = 0; i < count; i++) {
        printf("%s\t%s\t%s\t%s\t%s\t%.2f\t%d\n", 
            books[i].barcode, books[i].title, books[i].author,
            books[i].publisher, books[i].publish_date, books[i].price, books[i].count);
    }
}

// 添加一本新书
void add_book(Book* books, int* count) {
    Book book;
    printf("Enter barcode: ");
    scanf("%s", book.barcode);
    printf("Enter title: ");
    scanf("%s", book.title);
    printf("Enter author: ");
    scanf("%s", book.author);
    printf("Enter publisher: ");
    scanf("%s", book.publisher);
    printf("Enter publish date: ");
    scanf("%s", book.publish_date);
    printf("Enter price: ");
    scanf("%f", &book.price);
    printf("Enter count: ");
    scanf("%d", &book.count);
    books[*count] = book;
    (*count)++;
}

// 删除一本书
void delete_book(Book* books, int* count) {
    char barcode[MAX_LEN];
    printf("Enter barcode of book to delete: ");
    scanf("%s", barcode);
    for (int i = 0; i < *count; i++) {
        if (strcmp(books[i].barcode, barcode) == 0) {
            for (int j = i; j < *count - 1; j++) {
                books[j] = books[j+1];
            }
            (*count)--;
            printf("Book deleted!\n");
            return;
        }
    }
    printf("Book not found!\n");
}

// 保存书籍信息到文件
void save_books(Book* books, int count) {
    FILE* fp = fopen("books.dat", "wb");
    if (fp == NULL) {
        printf("Error opening file!\n");
        return;
    }
    fwrite(books, sizeof(Book), count, fp);
    fclose(fp);
    printf("Books saved to file!\n");
}

// 从文件中加载书籍信息
void load_books(Book* books, int* count) {
    FILE* fp = fopen("books.dat", "rb");
    if (fp == NULL) {
        printf("No data file found.\n");
        return;
    }
    fread(books, sizeof(Book), 100, fp);
    fclose(fp);
    for (int i = 0; i < 100; i++) {
        if (strlen(books[i].barcode) > 0) {
            (*count)++;
        }
    }
    printf("%d books loaded from file.\n", *count);
}

注意：该程序中使用了一个数据文件 "books.dat" 来存储书籍信息。在运行程序前，请确保该文件已经存在。如果该文件不存在，程序将提示用户无法打开数据文件。