C 鍊錶簡單功能實現

實現的是乙個小型圖書館的程式，功能包括增加新書，以及讀者借書和還書等。

**如下：

#include 

#include 
#include 
#include 
#include 
using
namespace
std;
class patron;
class book
bool
operator==(const book &bk) const
private:
char *title;
patron *patron;
ostream &printbook(ostream &) const;
friend ostream &operator
<<(ostream &out, const book &bk)
friend
class checkoutbook;
friend
class patron;
friend
void includebook();  //友元函式
friend
void checkoutbook();
friend
void returnbook();
};class author
bool
operator==(const author & ar) const
private:
char *name;
list
books;
ostream &printauthor(ostream &) const;
friend ostream &operator
<<(ostream &out, const author &ar)
friend
void includebook();
friend
void checkoutbook();
friend
void returnbook();
friend
class checkoutbook;
friend
class patron;
};class checkoutbook
bool
operator==(const checkoutbook &bk) const
private:
list
::iterator author;
list
::iterator book;
friend
void checkoutbook();
friend
void returnbook();
friend
class patron;
};class patron
bool
operator==(const patron &pn) const
private:
char *name;
list
books;
ostream &printpatron(ostream &) const;
friend ostream &operator
<<(ostream &out, const patron &pn)
friend
void checkoutbook();
friend
void returnbook();
friend
class book;
};list
catalog['z' + 1];  //作家陣列
list
people['z' + 1];   //顧客陣列
//三個成員函式
ostream &author::printauthor(ostream &out) const
return out;
}ostream &book::printbook(ostream &out) const
ostream &patron::printpatron(ostream &out) const
else
out << "has no books.\n";
return out;
}//三個被呼叫的函式
template
//過載《的模板函式
ostream &operator
<<(ostream &out, const
list
&lst)
char *getstring(char *msg)
void status()
//友元函式
void includebook()
else
(*oldauthor).books.push_front(newbook);  //查到了
}void checkoutbook()
while(true)
list
::iterator patronref;
patronref = find(people[patron.name[0]].begin(), people[patron.name[0]].end(), patron);
checkoutbook checkedoutbook(authorref, bookref);
if(patronref == people[patron.name[0]].end())
else
}void returnbook()
while(true)
while(true)
checkoutbook checkoutbook(authorref, bookref);
(*bookref).patron = 0;
(*patronref).books.remove(checkoutbook);
}int menu()
int main()
}return
0;}

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