制作一个简易图书管理系统（需要读取记事本的数据） 用c语言 把功能注释好

Question

采用c语言 需要使用记事本读取数据，可只做出查询，排序，添加功能，每行进行相应的注释，感谢

Answer 1

给你个参考吧，类似的，如有问题可以问。

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

#define EMPTY     -1        // 初始标志
#define DEL_EMPTY  0        // 删除标志
#define _MAX       200      //库存最大数量

typedef struct BookInfo {
    int _count;
    int _price;
    char _id[10];
    char _author[20];
    char _name[50];
    char _introduction[100];
}BookData;

BookData books_house[_MAX] = { -1, 0,"","", "", "", };

// 书仓信息
void books_house_info()
{
    printf("--------------------书籍信息--------------------\n");
    printf("ID\t书名\t作者\t价格\t数量\t简介\n");
    for (int i = 0; i < _MAX; ++i) {
        if (books_house[i]._count == EMPTY)
            break;
        else if (books_house[i]._count == DEL_EMPTY)
            continue;
        printf("%s\t", books_house[i]._id);
        printf("%s\t", books_house[i]._name);
        printf("%s\t", books_house[i]._author);
        printf("%d\t", books_house[i]._price);
        printf("%d\t", books_house[i]._count);
        printf("%s\t", books_house[i]._introduction);
        printf("\n");
    }
    printf("------------------------------------------------\n");
}

// 增添书
bool books_house_add(BookData info)
{
    for (int i = 0; i < _MAX; ++i) {
        if (books_house[i]._count == EMPTY ||
            books_house[i]._count == DEL_EMPTY) {
            for (int j = 0; j < _MAX; ++j) {
                if (strcmp(books_house[j]._id, info._id) == 0 ||
                    strcmp(books_house[j]._name, info._name) == 0) {
                    return false;
                }
            }
            books_house[i] = info; break;
        }
    }
    books_house_info();
    return true;
}

// 删除书
void books_house_del(BookData info)
{
    for (int i = 0; i < _MAX; ++i) {
        if (strcmp(books_house[i]._name, info._name) == 0) {
            books_house[i]._count = DEL_EMPTY;
            break;
        }
    }
    books_house_info();
}

// 价格排序(升序)
void books_house_sort()
{
    for (int i = 0; i < _MAX - 1; ++i) {
        if (books_house[i]._count == EMPTY) break;
        else if (books_house[i]._count == DEL_EMPTY) continue;
        for (int j = 0; j < _MAX - i - 1; ++j) {
            if (books_house[j]._price > books_house[j + 1]._price) {
                BookData tmp = books_house[j];
                books_house[j] = books_house[j + 1];
                books_house[j + 1] = tmp;
            }
        }
    }

    books_house_info();
}

// 修改书籍信息
void books_house_modify(BookData info)
{
    for (int i = 0; i < _MAX; ++i) {
        if (strcmp(books_house[i]._name, info._name) == 0) {
            books_house[i] = info; break;
        }
    }
    books_house_info();
}

// 根据书ID查找
bool books_house_search(BookData info)
{
    printf("\n--------------------查询结果--------------------\n");
    printf("ID\t书名\t作者\t价格\t数量\t简介\n");
    for (int i = 0; i < _MAX; ++i) {
        if (strcmp(books_house[i]._id, info._id) == 0) {
            printf("%s\t", books_house[i]._id);
            printf("%s\t", books_house[i]._name);
            printf("%s\t", books_house[i]._author);
            printf("%d\t", books_house[i]._price);
            printf("%d\t", books_house[i]._count);
            printf("%s\t", books_house[i]._introduction);
            printf("\n");
            return true;
            break;
        }
    }
    return false;
}

// 书籍信息
void set_book_info(BookData *book)
{
    printf("输入ID：");
    scanf_s("%s", book->_id, sizeof(book->_id));

    printf("输入书名：");
    scanf_s("%s", book->_name, sizeof(book->_name));

    printf("输入作者：");
    scanf_s("%s", book->_author, sizeof(book->_author));

    printf("输入简介：");
    scanf_s("%s", book->_introduction, sizeof(book->_introduction));

    printf("输入数量：");
    scanf_s("%d", &book->_count);

    printf("输入价格：");
    scanf_s("%d", &book->_price);
}

void books_house_manage_menu()
{
    system("cls");
    printf("                图书管理系统    \n\n");
    printf("            |    1.查看库存    |\n");
    printf("                2.录入书籍     \n");
    printf("            |    3.删除书籍    |\n");
    printf("                4.查询书籍     \n");
    printf("            |    5.价格排序    |\n");
    printf("                6.修改信息     \n");
    printf("            |    7.退出        |\n");
    printf("\n-----\n");
    printf("请问你想操作什么: ");
}

int main(int argc, char **argv)
{
    do {
        int select;
        books_house_manage_menu();
        scanf_s("%d", &select);
        switch (select)
        {
        case 1: {
            books_house_info();
            break;
        }
        case 2: {
            BookData book;
            set_book_info(&book);
            books_house_add(book) ? NULL : printf("**该书籍已存在！请勿重复输入！\n");
            break;
        }
        case 3: {
            BookData book;
            printf("输入需要删除的书名：");
            scanf_s("%s", book._name, sizeof(book._name));
            books_house_del(book);
            break;
        }
        case 4: {
            BookData book;
            printf("输入需要查询的ID号：");
            scanf_s("%s", book._id, sizeof(book._id));
            books_house_search(book);
            break;
        }
        case 5: {
            books_house_sort();
            break;
        }
        case 6: {
            BookData book;
            printf("输入需要修改书籍的ID：");
            scanf_s("%s", book._id, sizeof(book._id));
            if (books_house_search(book)) {
                printf("请输入以下提示的修改信息\n");
                set_book_info(&book);
                books_house_modify(book);
            }
            break;
        }
        case 7: {
            return 0;
        }
        default:
            break;
        }
        printf("\n");
        system("pause");
    } while (true);

    return 0;
}