无标题.txt

学生成绩管理

#include<iostream.h>
#include<iomanip.h>
#include<string.h>
#include<fstream.h>
const int Maxr=10000;       //最多的读者
const int Maxb=1000;       //最多的图书
const int Maxbor=5;       //没位读者最多借5本书
class Reader              //读者类
{
	int tag;               //删除标记 1：已删0：未删
	int no;                //读者编号
	char name[10];         //读者姓名
	int borbook[Maxbor];   //所借图书
public:
	Reader(){}
	char *getname(){return name;}  //获取姓名
	int gettag() {return tag;}     //获取删除标记 
	int getno(){return no;}        //获取读者编号
	void setname(char na[])        //设置姓名
	{
		strcpy(name,na);
	}
	void delbook(){tag=1;}         //设置删除标记
	void addreader(int n,char*na)  //增加读者
	{
		tag=0;
		no=n;
		strcpy(name,na);
		for(int i=0;i<Maxbor;i++)
			borbook[i]=0;
	}
	void borrowbook(int bookid)  //借书操作
	{
		for(int i=0;i<Maxbor;i++)
		{
		    if(borbook[i]==0)
			{
				borbook[i]=bookid;
				return;
			}
		}
	}
	int retbook(int bookid)//还书操作
	{
		for(int i=0;i<Maxbor;i++)
		{
			if(borbook[i]==bookid)
			{
				borbook[i]=0;
				return 1;
			}
		}
		return 0;
	}

    void disp()//输出读者信息
	{
	      cout<<setw(5)<<no<<setw(10)<<"       "<<name<<"       借书编号:[";
		  for(int i=0;i<Maxbor;i++)
			 if (borbook[i]!=0)
				cout<<borbook[i]<<"|";
		  cout<<"]"<<endl;
	
	}
};
class RDatabase                          //读者库类
{
	int top;                             //读者记录指针
	Reader read[Maxr];                   //读者记录
public:
	RDatabase()                          //构造函数，将reader.txt读到reas[]中
	{
		Reader s;
		top=-1;
		fstream file("reader.txt",ios::in);
		while (1)
		{
		file.read((char*)&s,sizeof(s));
		if(!file) break;
		top++;
		read[top]=s;
		}
		file.close();
	}
	void clear()                         //删除所有读者信息
	{
		top=-1;
	}
	int addreader(int n, char *na)     //添加读者时先查找是否存在
	{
		Reader *p=query(n);
		if(p==NULL)
		{
			top++;
			read[top].addreader(n,na);
			return 1;
		}
		return 0;
	}
	Reader *query(int readerid)          //按编号查找
	{
		for(int i=0;i<=top;i++)
			if(read[i].getno()==readerid && read[i].gettag()==0)
				return &read[i];
			return NULL;
	}
	void disp()                          //输出所有读者信息
	{
		for (int i=0;i<=top;i++)
			read[i].disp();
	
	}
	void readerdata();                   //读者库维护
	~RDatabase()                         //析构函数，将read[]写入reader.txt文件中
	{
		fstream file("reader.txt",ios::out);
		for (int i=0;i<=top;i++)//
			if (read[i].gettag()==0)
				file.write((char*)&read[i],sizeof(read[i]));
			file.close();
	}
};
void RDatabase::readerdata()
{
	int choice=1;
	char rname[200];
	int readerid;
	Reader *r;
	while (choice!=0)
	{
		cout<<"读者维护 1：新增 2：更改 3：删除 4：查找 5：显示 6：全删 0：退出=>";
		cin>>choice;
		switch(choice)
		{
		case 1:
			cout<<"输入读者编号:";
			cin>>readerid;
			cout<<"输入读者姓名:";
			cin>>rname;
			addreader(readerid,rname);
			break;
		case 2:
			cout<<"输入读者编号:";
			cin>>readerid;
			r=query(readerid);
			if (r==NULL)
			{
				cout<<"该读者不存在"<<endl;
				break;
			}
			cout<<"输入新的姓名:";
			cin>>rname;
			r->setname(rname);
			break;
		case 3:
			cout<<"输入读者编号:";
			cin>>readerid;
			r=query(readerid);
			if (r==NULL)
			{
				cout<<"该读者不存在"<<endl;
				break;
			}
			r->delbook();
			break;
		case 4:
			cout<<"输入读者编号:";
			cin>>readerid;
			r=query(readerid);
			if (r==NULL)
			{
				cout<<"该读者不存在:"<<endl;
				break;
			}
			r->disp();
			break;
		case 5:
			disp();
			break;
		case 6:
			clear();
			break;

		}
	}
}
class Book//图书类
{
	int tag;//删除标记 1：已删除0：未删
    int no;//图书编号
    char name[20];//书名
    int onshelf;//是否在架次 1：在架次 0：已借
public:
	Book() {}
	char *getname(){return name;}//获取姓名
	int getno(){return no;}//获取图书编号
	int gettag(){return tag;}//获取删除标记
	void setname(char na[])//设置书名
	{
		strcpy(name,na);
	}
	void delbook(){tag=1;}//删除图书
	void addbook(int n,char *na)//增加图书
	{
		tag=0;
	    no=n;
	    strcpy(name,na);
	    onshelf=1;
	}
	int borrowbook()//借书操作
	{
		if(onshelf==1)
		{
			onshelf=0;
			return 1;
		}
		return 0;
	}
	void retbook()//还书操作
	{
		onshelf=1;
	}
	
	void disp()//输出图书
	{
		cout<<setw(6)<<no<<setw(18)<<name<<setw(10)<<(onshelf==1?"在架":"已借")<<endl;
	}

};
class BDatabase//图书库类
{
	int top;//图书记录指针
	Book book[Maxb];//图书记录
public:
	BDatabase()//构造函数
	{
		Book b;
		top=-1;
		fstream file("book.txt",ios::in);
		while(1)
		{
			file.read((char*)&b,sizeof(b));
			if(!file) break;
			top++;
			book[top]=b;
		}
		file.close();
	}
	void clear()//全删
	{
		top=-1;
	}
	int addbook(int n,char*na)//增加图书
	{
		Book *p=query(n);
		if(p==NULL)
		{
			top++;
			book[top].addbook(n,na);
			return 1;
		}
		return 0;
	}
	Book *query(int bookid)//查找图书
	{
		for(int i=0;i<=top;i++)
			if(book[i].getno()==bookid && book[i].gettag()==0)
				return &book[i];
			return NULL;
	}
	void bookdata();//图书库维护
	void disp()
	{
		for(int i=0;i<=top;i++)
			if(book[i].gettag()==0)
				book[i].disp();

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

};
void BDatabase::bookdata()
{
	int choice=1;
	char bname[40];
	int bookid;
	Book *b;
	while(choice!=0)
	{
		cout<<"图书维护 1：新增 2：更改 3：删除 4：查找 5：显示 6：全删 0：退出=>";
		cin>>choice;
		switch(choice)
		{
		case 1:
			cout<<"输入图书编号:";
			cin>>bookid;
			cout<<"输入图书名:";
			cin>>bname;
			addbook(bookid,bname);
			break;
		case 2:
			cout<<"输入图书编号:";
			cin>>bookid;
			b=query(bookid);
			if (b==NULL)
			{
				cout<<"该图书不存在"<<endl;
				break;
			}
			cout<<"输入新书名:";
			cin>>bname;
			b->setname(bname);
			break;
		case 3:
			cout<<"输入图书编号:";
			cin>>bookid;
			b=query(bookid);
			if (b==NULL)
			{
				cout<<"该图书不存在"<<endl;
				break;
			}
			b->delbook();
			break;
		case 4:
			cout<<"输入图书编号:";
			cin>>bookid;
			b=query(bookid);
			if (b==NULL)
			{
				cout<<"该图书不存在:"<<endl;
				break;
			}
			b->disp();
			break;
		case 5:
			disp();
			break;
		case 6:
			clear();
			break;
		}
	}
}
void main()
{
	int choice=1,bookid,readerid;
	RDatabase ReaderDB;
	Reader *r;
	BDatabase BookDB;
	Book *b;
	while(choice!=0)
	{
		cout<<"1:借书 2:还书 3:图书维护 4:读者维护 0:离开=>";
		cin>>choice;
		switch (choice)
		{
		case 1:
			cout<<"借书 读者编号:";
			cin>>readerid;
			cout<<"图书编号:";
			cin>>bookid;
			r=ReaderDB.query(readerid);
			if (r==NULL)
			{
				cout<<"不存在该读者，不能借书"<<endl;
				break;
			}
			b=BookDB.query(bookid);
			if (b==NULL)
			{
				cout<<"不存在该图书，不能借书"<<endl; 
				break;
			}
			if (b->borrowbook()==0)
			{
				cout<<"该图书已借出，不能借书"<<endl;
				break;
			}
			r->borrowbook(b->getno());
			break;
		case 2:
			cout<<"还书 读者编号:";
			cin>>readerid;
			cout<<"图书编号:";
			cin>>bookid;
			r=ReaderDB.query(readerid);
			if(r==NULL)
			{
				cout<<"不存在该读者，不能还书"<<endl;
				break;
			}
			b=BookDB.query(bookid);
			if(b==NULL)
			{
			    cout<<"不存在该图书，不能还书"<<endl;
				break;
			}
			b->retbook();
			r->retbook(b->getno());
			break;
		case 3:
			BookDB.bookdata();
			break;
		case 4:
			ReaderDB.readerdata();
			break;


		}
	}
}