为图书馆编写一个图书管理软件，每本图书包括书号、书名、作者、价格、出版社、数量等数据。需要实现图书浏览、查找、增加和删除、借出、还书等功能。
要求：
Ø用户菜单和逻辑功能相分离
Ø分别编写菜单选择各功能模块，在主调函数中依据用户选择调用不同模块对应的函数
Ø用文件保存图书信息，一行为一条记录
Ø内存中使用单链表结构存储从文件中读取的图书数据
Ø按照工程化思想，采用多文件形式组织程序
Ø用参数传递数据，尽量不要用全局变量
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <conio.h> /*getch()函数使用的头文件*/
#include <windows.h> /*Sleep()函数使用的头文件*/
#include <string.h> /*strcmp()函数使用的头文件*/
#include<assert.h>
/*图书结构体：图书编号，图书名，图书作者，出版社，库存量*/
typedef struct Book
{
int iNum;
char acName[15];
char acAuthor[15];
char acPress[15];
int iAmount;
struct Book* next;
}Book;
/*读者：读者编号，读者姓名，性别，可借书数,读者已借书的编号*/
typedef struct Reader
{
int iNum;
char acName[15];
char acSex[4];
char position[20];
int iMax; //Student 20本 teacher 40本
int iAmount;
int aiBookId[100];
int balance;
int day;
struct Reader* next;
}Reader;
void ShowLibInfo(const Book* book, const Reader* reader);
void ShowLibBook(Book* book);
Book* AddBook(Book* book);
Book* DealoldBook(Book* book);
void foundBook(Book* book);
void foundReader_Info(Reader* reader);
void foundReaderInfo(Reader* reader);
Reader* LendBook(Reader* reader, Book* book);
void returnBook(Reader* reader, Book* book);
void save(Book* book);
Book* read1();
void ShowMainMenu()
{
system("cls");
printf("\n\n\n\n\n");
printf("\t|----------------------欢迎进入---------------------------\n");
printf("\t| 读者管理系统 \n");
printf("\t| 1、查询图书馆的总信息 \n");
printf("\t| 2、查询图书馆藏书信息 \n");
printf("\t| 3、存入新书 \n");
printf("\t| 4、旧书处理 \n");
printf("\t| 5、根据书名检索书刊信息 \n");
printf("\t| 6、查询读者的借阅信息 \n");
printf("\t| 7、查询读者信息 \n");
printf("\t| 8、读者借书 \n");
printf("\t| 9、读者还书 \n");
printf("\t| 10、文件保存 \n");
printf("\t| 11、从文件读取 \n");
printf("\t| 0、退出 \n");
printf("\t|---------------------------------------------------------\n");
printf("新打开程序需先添加管理员\n");
printf("\n");
printf("\t\t请选择（0-11）：");
}
int main()
{
Book* book = NULL;
Reader* reader = NULL;
int iItem;
ShowMainMenu();/*调用ShowMainMenu函数绘制界面*/
scanf("%d", &iItem);/*提示用户输入数字*/
getchar();
while (1)
{
switch (iItem)
{
case 0:return 0;
break;
case 1:ShowLibInfo(book, reader);
break;
case 2:ShowLibBook(book);
break;
case 3:book = AddBook(book);
break;
case 4:book = DealoldBook(book);
break;
case 5:foundBook(book);
break;
case 6:foundReader_Info(reader);
break;
case 7:foundReaderInfo(reader);
break;
case 8:reader = LendBook(reader, book);
break;
case 9:returnBook(reader, book);
break;
case 10:save(book);
break;
case 11:book = read1();
break;
default:
printf("\t输入有误，请重新输入!\n");
Sleep(2000);
}
ShowMainMenu();/*调用ShowMainMenu函数绘制界面*/
scanf("%d", &iItem);/*提示用户输入数字*/
getchar();
}
return 0;
}
void ShowLibInfo(const Book* book1, const Reader* reader1)
{
Book* book = book1;
Reader* reader = reader1;
int bookNUm = 0, readerNUm = 0, mangerNUm = 0;
while (book != NULL)
{
bookNUm++;
book = book->next;
}
while (reader != NULL)
{
readerNUm++;
reader = reader->next;
}
printf("本图书馆共有藏书%d本，读者%d人\n", bookNUm, readerNUm);
printf("按任意键返回\n");
getchar();
return;
}
void ShowLibBook(Book* book1)
{
Book* book = book1;
while (book != NULL)
{ // \t :制表符
printf("%d\t%s\t%s\t%s\t%d\n", book->iNum, book->acName, book->acAuthor, book->acPress, book->iAmount);
book = book->next;
}
printf("\n按任意键返回\n");
getchar();
return;
}
Book* AddBook(Book* book1)
{
Book* book = book1;
if (book == NULL)
{
Book* tmp = (Book*)malloc(sizeof(Book));
tmp->next = NULL;
assert(tmp);
printf("输入书的编号:");
scanf("%d", &tmp->iNum);
getchar();
printf("输入书的名称:");
gets(&tmp->acName);
printf("输入书的作者:");
gets(tmp->acAuthor);
printf("输入书的出版社:");
gets(tmp->acPress);
printf("输入书的库存量:");
scanf("%d", &tmp->iAmount);
book = tmp;
printf("按任意键返回\n");
getchar();
return book;
return;
}
while (1)
{
while (book->next == NULL)
{
int flag = 1;
while (flag)
{
Book* tmp = (Book*)malloc(sizeof(Book));
tmp->next = NULL;
assert(tmp);
printf("输入书的编号:");
scanf("%d", &tmp->iNum);
getchar();
printf("输入书的名称:");
gets(&tmp->acName);
printf("输入书的作者:");
gets(tmp->acAuthor);
printf("输入书的出版社:");
gets(tmp->acPress);
printf("输入书的库存量:");
scanf("%d", &tmp->iAmount);
book->next = tmp;
printf("是否继续输入:1==>继续\t0==>结束\t");
scanf("%d", &flag);
getchar();
if (flag == 0)
{
printf("按任意键返回\n");
getchar();
return book1;
}
}
}
book = book->next;
}
printf("按任意键返回\n");
getchar();
return;
}
Book* DealoldBook(Book* book1)
{
Book* book = book1;
Book* prev = book1;
printf("输入要处理旧书的编号:");
int id;
scanf("%d", &id);
getchar();
while (book != NULL)
{
if (id == book->iNum)
{
if (book1 == book)
{
book = book->next;
free(prev);
return book;
}
prev->next = book->next;
free(book); // free():释放资源
printf("已将旧书处理掉!\n");
printf("按任意键返回\n");
getchar();
return book1;
}
prev = book;
book = book->next;
}
printf("没有找到该图书\n");
printf("按任意键返回\n");
getchar();
return book1;
}
void foundBook(Book* book1)
{
Book* book = book1;
printf("输入要查找的书的id:");
int id;
scanf("%d", &id);
getchar();
while (book != NULL)
{
if (id == book->iNum)
{
printf("该书的信息如下:\n");
printf("%d\t%s\t%s\t%s\t%d\n", book->iNum, book->acName, book->acAuthor, book->acPress, book->iAmount);
printf("按任意键返回\n");
getchar();
return;
}
book = book->next;
}
printf("没有找到该书!\n");
printf("按任意键返回\n");
getchar();
return;
}
void foundReader_Info(Reader* reader1)
{
Reader* reader = reader1; //备份
printf("输入读者的id:");
int id;
scanf("%d", &id);
getchar();
while (reader)
{
if (id == reader->iNum)
{
printf("借阅的书的编号如下:\n");
for (int i = 0; i < reader->iMax; i++) //根据读者可以借阅的数量作为循环终止条件
{
if (reader->aiBookId[i] != 0) //数组里不为0，证明有一条记录，因为：数组初始化为0，并且书的编号不可能为0
{
printf("%d\n", reader->aiBookId[i]);
}
}
printf("按任意键返回\n");
getchar();
return;
}
reader = reader->next;
}
printf("没有该读者!\n");
printf("按任意键返回\n");
getchar();
return;
}
void foundReaderInfo(Reader* reader1)
{
Reader* reader = reader1;
printf("输入读者的id:");
int id;
scanf("%d", &id);
getchar();
while (reader)
{
if (id == reader->iNum)
{
printf("读者id:%d\n", reader->iNum);
printf("读者姓名:%s\n", reader->acName);
printf("读者性别:%s\n", reader->acSex);
printf("读者职位:%s\n", reader->position);
printf("读者已借阅书的数量:%d\n", reader->iAmount);
printf("按任意键返回\n");
getchar();
return;
}
reader = reader->next;
}
printf("没有找到该读者\n");
printf("按任意键返回\n");
getchar();
return;
}
Reader* LendBook(Reader* reader1, Book* book1)
{
Reader* reader = reader1;
Book* book = book1;
Reader* prev = reader1;
Reader* tmpp = reader1;
printf("输入读者id:");
int id;
scanf("%d", &id);
getchar();
if (reader == NULL)
{
Reader* tmp = (Reader*)malloc(sizeof(Reader));
tmp->next = NULL;
tmp->iAmount = 0;
tmp->iNum = id;
printf("输入读者名字:");
scanf("%s", &tmp->acName);
getchar();
printf("输入读者性别:");
scanf("%s", &tmp->acSex);
getchar();
printf("输入读者职位:<student\tor\tteacher>");
scanf("%s", &tmp->position);
getchar();
if (strcmp(tmp->position, "student") == 0)
{
tmp->iMax = 20;
tmp->day = 30;
}
else {
tmp->iMax = 40;
tmp->day = 60;
}
for (int i = 0; i < tmp->iMax; i++)
{
tmp->aiBookId[i] = 0;
}
printf("输入要借的书的编号:");
int id_book;
scanf("%d", &id_book);
getchar();
while (book != NULL)
{
if (id_book == book->iNum)
{
if (book->iAmount <= 1)
{
printf("借阅失败，该图书库存不足.\n");
printf("按任意键返回\n");
getchar();
return NULL;
}
if ((tmp->iAmount) + 1 > tmp->iMax)
{
printf("借阅失败,该读者借阅图书数量已达上线.\n");
printf("按任意键返回\n");
getchar();
return NULL;
}
book->iAmount--;
tmp->aiBookId[tmp->iAmount] = id_book;
tmp->iAmount;
reader = tmp;
printf("借阅成功!\n");
printf("按任意键返回\n");
getchar();
return reader;
}
book = book->next;
}
printf("没有找到该书!\n");
printf("按任意键返回\n");
getchar();
return reader1;
}
if (reader != NULL)
{
while (reader != NULL)
{
if (id == reader->iNum)
{
printf("图使馆当前的书籍册:\n");
ShowLibBook(book);
printf("输入要借的书的编号:");
int id_book;
scanf("%d", &id_book);
getchar();
while (book != NULL)
{
if (id_book == book->iNum)
{
if (book->iAmount <= 1)
{
printf("借阅失败，该图书库存不足.\n");
printf("按任意键返回\n");
getchar();
return reader1;
}
if (tmpp->iAmount + 1 > tmpp->iMax)
{
printf("借阅失败,该读者借阅图书数量已达上线.\n");
printf("按任意键返回\n");
getchar();
return reader1;
}
reader->iAmount++;
reader->aiBookId[tmpp->iAmount] = id_book;
return reader1;
}
book = book->next;
}
printf("没有找到该书!\n");
printf("按任意键返回\n");
}
reader = reader->next;
}
}
}
void returnBook(Reader* reader1, Book* book1)
{
Reader* reader = reader1;
Book* book = book1;
printf("请输入读者的id:");
int id;
scanf("%d", &id);
getchar();
if (reader != NULL)
{
while (reader != NULL)
{
if (id == reader->iNum)
{
printf("请输入要还的书的编号:");
int id_book;
scanf("%d", &id_book);
getchar();
for (int i = 0; i < reader->iMax; i++)
{
if (reader->aiBookId[i] == id_book)
{
reader->aiBookId[i] = 0;
while (book)
{
if (id_book == book->iNum)
{
book->iAmount++;
printf("还书成功!\n");
printf("按任意键返回\n");
getchar();
return reader1;
}
book = book->next;
}
}
}
printf("没有找到该图书，检查图书的Id\n");
printf("按任意键返回\n");
getchar();
return reader1;
}
reader = reader->next;
}
printf("没有找到该读者，检查读者id是否输入有误\n");
printf("按任意键返回\n");
getchar();
return reader1;
}
}
void save(Book* book1)
{
FILE* fp;
Book* pCur = book1;
int iCount = 0;
if (pCur == NULL)
{
printf("\n没有学生记录!\n");
return;
}
if ((fp = fopen("book.txt", "wb")) == NULL)
{
printf("创建文件失败!\n");
getchar();
exit(1);
}
while (pCur)
{
fwrite(pCur, sizeof(Book), 1, fp);
pCur = pCur->next;
iCount++;
}
printf("\n");
printf("保存文件的数据数目为:%d\n", iCount);
fclose(fp);
}
Book* read1()
{
FILE* fp;
Book* pHead = NULL, * pTemp = NULL, * pCur = NULL;
if ((fp = fopen("book.txt", "r")) == NULL)
{
printf("\n文件打开失败!请检查文件名!\n");
exit(0);
}
pTemp = (Book*)malloc(sizeof(Book));
while (fread(pTemp, sizeof(Book), 1, fp))
{
if (!pHead)
{
pHead = pCur = pTemp;
}
else
{
pCur->next = pTemp;
pCur = pTemp;
}
pTemp = (Book*)malloc(sizeof(Book));
}
fclose(fp);
return pHead;
}
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