How to realize the Book Management system on C++
> booklist [I]; strcpy_s (p-> booklist [I], booklist [I]);} _ rend- > set_next (p); p-> set_next (NULL); _ rend = _ rend- > get_next ();} f_reader.close ();} void Reader::BrowseBorrowBook (Reader* pp) {int cnt = pp- > bookcnt; long long sign If (cnt = = 0) {printf ("\ n\ n"); printf ("\ t\ t you haven't borrowed any books yet! \ n ");} printf ("\ n\ n "); for (int I = 0; I
< cnt; i++) { printf("\t第%d次借阅的书籍:", i + 1); printf("%s\t", pp->Get_booklist (pp, I); cout show_book (); char bookname [200]; int amount; int flag = 1; int sign = 1; int exist = 0; cout bookname; if (strcmp (bookname, "0") = = 0) {return } while (bp) {if (bp- > get_bookname () = = bookname) {if (bp- > get_amount () = = 0) {cout get_flag () = = 0) {cout amount) {if (bp- > get_amount ())
< amount) { cout get_books() + amount; pp-> < 0) { cout get_id() == id) { flag = 1; break; } p = p->Get_next ();} if (flag) {cout > amount) {if (amount 0) {int temp = p-> get_amount () + amount; p-> set_amount (temp); cout set_amount (amount) Break;} else {cout sign) {if (sign = = 1 | | sign = = 0) {p-> set_flag (sign); break } else if (sign
< 0 || sign >1) {cout bookname; p-> set_bookname (bookname); char author; cout > author; p-> set_author (author); char press [200]; cout > press; p-> set_press (press); bend- > set_next (p) Bend = p; bend- > set_next (NULL);} p-> save (); fp- > cls (); printf ("\ n\ n"); printf ("\ t\ t *\ n") Printf ("\ t\ t *\ n"); printf ("\ t\ t book% d added successfully!\ n", bend- > get_id ()); printf ("\ t\ t *\ n") Printf; Sleep (1000); fp- > cls (); cout get_next (); int id; int amount; int flag = 0; char bookname; char author; char press; int exist = 0 Int sign = 0; Book* bp = bhead- > get_next (); bp- > show_book (); cout > id) {if (id = = 0) {return;} while (p) {if (p-> get_id () = = id) {exist = 1; break } p = p-> get_next ();} if (! exist) {p = bhead- > get_next (); cout cls (); changebookmenu (); while (1) {cout > choose Switch (choose) {case 1: cout > id; p-> set_id (id); cout bookname; p-> set_bookname (bookname); cout author; p-> set_author (author); cout press P-> set_press (press); cout amount) {if (amount 0) {p-> set_amount (amount); break } else {cout flag) {if (flag = = 2) {break } if (flag = = 1) {p-> set_flag (1); p-> save () Cout flag) {if (flag = = 2) {break } if (flag = = 1) {p-> set_flag (0); p-> save () Cout bookname) {if (strcmp (bookname, "0") = = 0) {return;} while (bp) {if (bp- > get_bookname () = = bookname) {flag = 1; break } bp = bp- > get_next ();} if (flag = = 0) {cout get_next (); Book* pp = bhead While (bp) {/ / bp- > next may be the last if of the linked list (bp- > get_bookname () = = bookname) {if (bp- > get_next () = = NULL) {bhead- > set_next (NULL);} else {pp- > set_next (bp- > get_next ()) } pp = pp- > get_next (); bp = bp- > get_next ();} cout get_bookcnt ()-1; jacks +) {strcpy (rp- > get_booklist (rp, j), rp- > get_booklist (rp, j + 1);} int temp = rp- > get_bookcnt () Temp--; rp- > set_bookcnt (temp);} rp = rp- > get_next ();} pp- > save ();} void Manger::BrowseReader () {cout get_next ();} void Manger::ChangePassword () {DBFile* fp = new DBFile; Manger* p = mhead- > get_next (), * mp = new Manger Int flag = 0; int sign = 0; char maccount; char mpassword; char mspassword; cout > maccount) {if (strcmp (maccount, "0") = = 0) {return } while (p) {if (strcmp (p-> account, maccount) = = 0) {flag = 1; break;} p = p-> get_next ();} if (flag) {break } else {cout get_next ();}} if (flag) {p = mhead- > get_next (); cout > mspassword) {if (strcmp (mspassword, "0") = = 0) {return } while (p) {if (strcmp (p-> spassword, mspassword) = = 0) {sign = 1; break;} p = p-> get_next () } if (sign) {cout > mpassword) {if (strcmp (mpassword, "0") = = 0) {return } if (strlen (mpassword) > id & & f_book > > flag & & f_book > > amount & & f_book > > bookname & & f_book > > author & & f_book > > press) {Book* p = new Book; p-> id = id; p-> flag = flag; p-> amount = amount; p-> bookname = bookname P-> author = author; p-> press = press; bend- > set_next (p); p-> set_next (NULL); bend = bend- > get_next ();} f_book.close ();} void Book::save () {Book* bp = bhead- > get_next (); ofstream f_book ("book.txt", ios::out); while (bp) {f_book id
