C++实现的小型图书管理系统

#include
#include
#include
using namespace std;
const int BMAX = 50;   //书最多个数

//图书管理模块

//图书类
class book
{
public:
 int no;                                      //图书编号
 char name[20];                               //图书名称
 char author[10];                             //作者
 int price;                                   //价格
 int b_flag;                                  //1为在架，2为借出
 int b_del;                                   //1为存在, 2为删除
public:
 book(){}                               //构造函数
 void setno(int n)
 {
  no = n;                             //图书编号取值
 }
 int getno()
 {
  return no;           //返回图书编号值
 }
 void setprice(int p)
 {
  price = p;                             //图书价格取值
 }
 int getprice()
 {
  return price;           //返回图书价格值
 }
 void setname(char na[])
 {
  strcpy(name, na);   //字符串复制
 }
 char* getname()
 {
  return name;  //返回图书名称
 }
 void setauthor(char a[])
 {
  strcpy(author, a);   //字符串复制
 }
 char* getauthor()
 {
  return author;  //返回图书作者
 }
 void borbook()
 {
  b_flag = 2;     //借书标志
 }
 void delbook()
 {
  b_del = 2;   //删除标志
 }
 void addbook(int no, char na[], char author[], int price)    //增加图书功能
 {
  setno(no);
  setname(na);
  setauthor(author);
  setprice(price);
  b_flag = 1;
  b_del = 1;
 }
}
;
//图书数据库类

class bdatabase
{
public:
 book btarray[BMAX];                                         //图书集合
 int top;
public:
 bdatabase()
 {

  book b;
  top = -1;
  fstream file("book.txt", ios::in);    //打开文件
  while (1)
  {
   file.read((char *)&b, sizeof(b));
   if (!file) break;
   top++;
   btarray[top] = b;
  }
  file.close();     //关闭文件
 }

 ~bdatabase()                      //析构函数，    将btarray[]写到book.txt文件中
 {
  fstream file("book.txt", ios::out);
  for (int i = 0; i <= top; i++)
  {
   if (btarray[i].b_del == 1)
    file.write((char *)&btarray[i], sizeof(btarray[i]));
  }
  file.close();
 }

 void addbooks()                                     //往图书数据库中加图书
 {
  book bk;
  int no;
  char bname[20];
  char bau[10];
  int pr;

  cout << endl << "请输入书号: ";
  cin >> no;
  cout << endl << "请输入书名: ";
  cin >> bname;
  cout << endl << "请输入作者: ";
  cin >> bau;
  cout << endl << "请输入价格: ";
  cin >> pr;
  cout << endl;
  bk.b_flag = 1;
  bk.addbook(no, bname, bau, pr);
  top++;
  btarray[top] = bk;
  return;
 }

 int findbooks(int suffix)        //查找图书，这个函数用于借书这书操作，suffix是数组下标
 {
  int no;
  cout << "请输入书号: ";
  cin >> no;
  for (int i = 0; i <= top; i++)
  {
   if (btarray[i].no == no && btarray[i].b_del == 1)
   {
    return i;
   }
  }
  return -1;
 }

 int findbooks()                                //查找图书,这个函数用于图书维护 
 {
  int no;
  char value[6];
  cout << "请输入书号: ";
  cin >> no;
  for (int i = 0; i <= top; i++)
  {
   if (btarray[i].no == no && btarray[i].b_del == 1)
   {
    if (btarray[i].b_flag == 1) strcpy(value, "在架");
    if (btarray[i].b_flag == 2) strcpy(value, "借出");
    cout << "书号: " << btarray[i].no << " 书名: " << btarray[i].name << " 作者: " << btarray[i].author << " 价格: " << btarray[i].price << " 图书状态 :" << value << endl;
    return i;
   }
  }
  return -1;
 }

 void editbooks()                                          //编辑图书
 {
  int cur;
  cur = findbooks();
  if (cur == -1)
  {
   cout << "没有这本书" << endl;
   return;
  }
  cout << "书号: " << btarray[cur].no << " 书名: " << btarray[cur].name << " 作者: " << btarray[cur].author << " 价格: " << btarray[cur].price << endl;
  cout << "请修改数据：" << endl;
  cout << endl << "书的名称: ";
  cin >> btarray[cur].name;
  return;
 }

 void delbooks()                                             //删除图书
 {
  int cur;
  cur = findbooks();
  if (cur == -1)
  {
   return;
  }
  if (btarray[cur].b_flag == 2)                              //删除时判断图书是否借出
  {
   cout << "该图书已经借出，请在归还后再删除。" << endl;
   return;
  }
  btarray[cur].b_del = 2;
  return;
 }

 void listbooks()                                             //显示全部图书
 {
  char value[6];
  for (int i = 0; i <= top; i++)
  {

   if (btarray[i].b_del == 1)
   {
    if (btarray[i].b_flag == 1) strcpy(value, "在架");
    if (btarray[i].b_flag == 2) strcpy(value, "借出");
    cout << "书号: " << btarray[i].no << " 书的名称: " << btarray[i].name << " 图书状态 :" << value << endl;
   }
  }
  return;
 }
}
;
//读者管理模块
//读者类
class reader
{
public:
 int no;
 int sex;     //读者性别，1表示男，0表示女
 char name[20];
 int r_del;  //1存在，2删除
 int r_bor;  //1借过书，2没有借书
 book brbook;
public:
 void addreader(int id, char na[], int s)//增加读者
 {
  no = id;
  sex = s;
  strcpy(name, na);
  r_del = 1;
 }
 void setbrbook(book bt)  //设置借书标记
 {
  brbook = bt;
 }

 book getbrbook()
 {
  return brbook;   //返回借书信息
 }
};
//读者数据库类
class rdatabase
{
public:
 reader rdarray[BMAX];
 int top;

public:
 rdatabase()
 {
  reader rd;
  top = -1;
  fstream file("reader.txt", ios::in); //打开文件
  while (1)
  {
   file.read((char *)&rd, sizeof(rd));
   if (!file) break;
   top++;
   rdarray[top] = rd;
  }
  file.close();  //关闭文件  
 }

 ~rdatabase()//析构函数
 {
  fstream file("reader.txt", ios::out);
  for (int i = 0; i <= top; i++)
  {
   if (rdarray[i].r_del == 1)
    file.write((char *)&rdarray[i], sizeof(rdarray[i]));
  }
  file.close();
 }

 void addreaders()                                            //添加读者
 {
  reader rd;
  int no;
  int rs;
  char rname[20];
  cout << "请输入学号: ";
  cin >> no;
  cout << endl << "请输入姓名: ";
  cin >> rname;
  cout << endl << "请输入性别（1为男，0为女）：";
  cin >> rs;
  cout << endl;
  rd.addreader(no, rname, rs);
  rd.r_bor = 2;
  top++;
  rdarray[top] = rd;
  return;
 }
 int findreaders(int suffix)     //查找读者，这个函数用于借书还书操作。 参数suffix是数组下标
 {
  int no;
  cout << "请输入学号: ";
  cin >> no;
  for (int i = 0; i <= top; i++)
  {
   if (rdarray[i].no == no && rdarray[i].r_del == 1)
   {
    return i;
   }
  }
  return -1;

 }

 int findreaders()                              //查找读者，这个函数用于读者维护操作
 {
  int no;
  char value[3];
  cout << "请输入学号: ";
  cin >> no;
  for (int i = 0; i <= top; i++)
  {
   if (rdarray[i].no == no && rdarray[i].r_del == 1)
   {
    if (rdarray[i].r_bor == 1) strcpy(value, "借");
    if (rdarray[i].r_bor == 2) strcpy(value, "无");
    cout << "学号: " << rdarray[i].no << " 姓名: " << rdarray[i].name << " 是否借书: " << value << endl;
    return i;
   }
  }
  return -1;
 }
 void editreaders()                                            //编辑读者信息
 {

  int cur;
  cur = findreaders();
  if (cur == -1)
  {
   cout << "没有该学生" << endl;
   return;
  }
  cout << "请修改数据：" << endl;
  cout << endl << " 姓名: ";
  cin >> rdarray[cur].name;
  return;
 }
 void delreaders()                            //删除读者，读者如果借书要还书后才能删除
 {
  int cur;
  cur = findreaders();
  if (cur == -1)
  {
   return;
  }
  if (rdarray[cur].r_bor == 1)
  {
   cout << "该用户借了图书，请还书后再删除" << endl;
   return;
  }
  rdarray[cur].r_del = 2;
  return;
 }
 void listreaders()                                                 //显示所有读者
 {
  char value[3];
  for (int i = 0; i <= top; i++)
  {

   if (rdarray[i].r_del == 1)
   {
    if (rdarray[i].r_bor == 1) strcpy(value, "借");
    if (rdarray[i].r_bor == 2) strcpy(value, "无");
    cout << "学号: " << rdarray[i].no << " 姓名: " << rdarray[i].name << " 是否借书: " << value << endl;
   }
  }
  return;
 }

}
;

void bookjiemain()                                                     //图书维护子菜单
{
 cout << "****************************" << endl;
 cout << "*         图书维护         *" << endl;
 cout << "*        (1)增 加          *" << endl;
 cout << "*        (2)更 改          *" << endl;
 cout << "*        (3)删 除          *" << endl;
 cout << "*        (4)查 找          *" << endl;
 cout << "*        (5)显 示          *" << endl;
 cout << "*        (6)返回上一层     *" << endl;
 cout << "****************************" << endl;
}

void readerjiemian()                                                       //读者维护子菜单
{
 cout << "****************************" << endl;
 cout << "*         读者维护         *" << endl;
 cout << "*        (1)增 加          *" << endl;
 cout << "*        (2)更 改          *" << endl;
 cout << "*        (3)删 除          *" << endl;
 cout << "*        (4)查 找          *" << endl;
 cout << "*        (5)显 示          *" << endl;
 cout << "*        (6)返回上一层     *" << endl;
 cout << "****************************" << endl;

}

void mainjiemian()                                                               //主界面
{
 cout << "***********************************************" << endl;
 cout << "*               图 书 管 理 系 统             *" << endl;
 cout << "*                                             *" << endl;
 cout << "*               (1) 借 书                     *" << endl;
 cout << "*                                             *" << endl;
 cout << "*               (2) 还 书                     *" << endl;
 cout << "*                                             *" << endl;
 cout << "*               (3) 图 书 管 理               *" << endl;
 cout << "*                                             *" << endl;
 cout << "*               (4) 用 户 管 理               *" << endl;
 cout << "*                                             *" << endl;
 cout << "*               (0) 退 出                     *" << endl;
 cout << "***********************************************" << endl;
}

void borrowtoreturn(char br)
//借书还书函数.参数br用来判断是“借书”还是“还书”.1为“借书”,2为“还书”
{
 int rdid = 0;
 int bkid = 0;
 int rsuffix, bsuffix;
 bdatabase t_bd;
 rdatabase t_rd;
 if (br == '1')           //借书
 {
  rsuffix = t_rd.findreaders(rdid);
  bsuffix = t_bd.findbooks(bkid);
  if (rsuffix == -1 || bsuffix == -1)
   return;
  if (t_bd.btarray[bsuffix].b_flag == 2)
  {
   cout << "图书已经借出，请选择其它图书" << endl;
   return;
  }
  if (t_rd.rdarray[rsuffix].r_bor == 1)
  {
   cout << "你已经借过图书，请先归还再借其它图书" << endl;
   return;
  }
  t_bd.btarray[bsuffix].b_flag = 2;
  t_rd.rdarray[rsuffix].r_bor = 1;
  t_rd.rdarray[rsuffix].brbook = t_bd.btarray[bsuffix];
  return;

 }
 if (br == '2')
 {
  rsuffix = t_rd.findreaders(rdid);
  bsuffix = t_bd.findbooks(bkid);
  if (rsuffix == -1 || bsuffix == -1)
   return;

  if (t_rd.rdarray[rsuffix].brbook.no == t_bd.btarray[bsuffix].no)
  {
   t_bd.btarray[bsuffix].b_flag = 1;
   t_rd.rdarray[rsuffix].r_bor = 2;
   t_rd.rdarray[rsuffix].brbook = t_bd.btarray[bsuffix];
  }
  else
  {
   cout << "请重新输入，读者借的图书号不正确" << endl;
   return;
  }
  return;
 }
}

void booksmange()
{
 char in;
 bdatabase  bd;
 do{
  bookjiemain();
  cin >> in;
  switch (in)
  {
  case '1':
   bd.addbooks();
   break;
  case '2':
   bd.editbooks();
   break;
  case '3':
   bd.delbooks();
   break;
  case '4':
   bd.findbooks();
   break;
  case '5':
   bd.listbooks();
   break;
  case '6':
   break;
  default:cout << "输入错误，请从新输入。" << endl;;
  }
 } while (in != '6');
 return;
}

void readersmange()
{
 char in;
 rdatabase  bd;
 do{
  readerjiemian();
  cin >> in;
  switch (in)
  {
  case '1':
   bd.addreaders();
   break;
  case '2':
   bd.editreaders();
   break;
  case '3':
   bd.delreaders();
   break;
  case '4':
   bd.findreaders();
   break;
  case '5':
   bd.listreaders();
   break;
  case '6':
   break;
  default:cout << "输入错误，请从新输入。" << endl;
  }
 } while (in != '6');
 return;

}

int main(int argc, char* argv[])
{
 char in;
 do{
  mainjiemian();
  cin >> in;
  switch (in)
  {
  case '1':
   borrowtoreturn(in);
   break;
  case '2':
   borrowtoreturn(in);
   break;
  case '3':
   booksmange();
   break;
  case '4':
   readersmange();
   break;
  case '0':
   break;
  default:cout << "输入错误，请从新输入。" << endl;
  }
 } while (in != '0');
 return 0;
}