图书管理系统——C++实现

#include "Book.h" #include<string> #include<fstream> #include<iostream> #include<iomanip> #include<cstdio> #include<cstdlib> using namespace std; Book::Book(char* bookno,char* Name, char* lsbn, char* Price, char* Author, char* time, char* banci) { strncpy(m_bookno, bookno, NUM2); strncpy(m_Name, Name, NUM1); strncpy(m_lsbn, lsbn, NUM1); strncpy(m_Price, Price, NUM2); strncpy(m_Author, Author, NUM2); strncpy(m_time, time, NUM1); strncpy(m_banci, banci, NUM1); } char* Book::Getbookno() { return m_bookno; } void Book::Setbookno(char* bookno) { strncpy(m_bookno, bookno, NUM2); } char* Book::GetName() { return m_Name; } void Book::SetName(char* Name) { strncpy(m_Name, Name, NUM1); } char* Book::Getlsbn() { return m_lsbn; } void Book::Setlsbn(char* lsbn) { strncpy(m_lsbn, lsbn, NUM1); } char* Book::GetPrice() { return m_Price; } void Book::SetPrice(char* Price) { strncpy(m_Price, Price, NUM2); } char* Book::GetAuthor() { return m_Author; } void Book::SetAuthor(char* Author) { strncpy(m_Author, Author, NUM2); } char* Book::Gettime() { return m_time; } void Book::Settime(char* time) { strncpy(m_time, time, NUM1); } char* Book::Getbanci() { return m_banci; } void Book::Setbanci(char* banci) { strncpy(m_banci, banci, NUM1); } void Book::WriteData() { ofstream file; file.open("F://book.dat", ios::binary | ios::app); try { file.write(m_bookno, NUM2); file.write(m_Name, NUM1); file.write(m_lsbn, NUM1); file.write(m_Price, NUM2); file.write(m_Author, NUM2); file.write(m_time, NUM1); file.write(m_banci, NUM1); } catch (...) { throw "file error occurred"; file.close(); } file.close(); } void Book::GetBookFromFile(int count) { char bookno[NUM2]; char Name[NUM1]; char lsbn[NUM1]; char Price[NUM2]; char Author[NUM2]; char time[NUM1]; char banci[NUM1]; ifstream file; file.open("F://book.dat", ios::binary); try { file.seekg(count*(NUM1 + NUM1 + NUM2 + NUM2+NUM1+NUM1+NUM2), ios::beg); file.read(bookno, NUM2); if (file.tellg() > 0) { strncpy(m_bookno, bookno, NUM2); } file.read(Name, NUM1); if (file.tellg() > 0) { strncpy(m_Name, Name, NUM1); } file.read(lsbn, NUM1); if (file.tellg() > 0) { strncpy(m_lsbn, lsbn, NUM1); } file.read(Price, NUM2); if (file.tellg() > 0) { strncpy(m_Price, Price, NUM2); } file.read(Author, NUM2); if (file.tellg() > 0) { strncpy(m_Author, Author, NUM2); } file.read(time, NUM1); if (file.tellg() > 0) { strncpy(m_time, time, NUM1); } file.read(banci, NUM1); if (file.tellg() > 0) { strncpy(m_banci, banci, NUM1); } } catch (...) { throw"file error occurred"; file.close(); } file.close(); } void Book::DeleteData(int count) { long respos; int DataCount = 0; fstream file; fstream tmpfile; ofstream ofile; char TempBuf[NUM1 + NUM1 + NUM2 + NUM2+NUM1+NUM1+NUM2]; file.open("F://book.dat", ios::binary | ios::in | ios::out); tmpfile.open("F://temp.dat", ios::binary | ios::in | ios::out|ios::trunc); file.seekg(0, ios::end); respos = file.tellg(); DataCount = respos / (NUM1 + NUM1 + NUM2 + NUM2+NUM1+NUM1+NUM2); if (count<0 && count>DataCount) { throw"Input number error"; } else { file.seekg(count*(NUM1 + NUM1 + NUM2 + NUM2+NUM1+NUM1+NUM2), ios::beg); for (int j = 0; j < (DataCount - count); j++) { memset(TempBuf, 0, NUM1 + NUM1 + NUM2 + NUM2+NUM1+NUM1+NUM2); file.read(TempBuf, NUM1 + NUM2 + NUM1 + NUM2+NUM1+NUM1+NUM2); tmpfile.write(TempBuf, NUM1 + NUM1 + NUM2 + NUM2+NUM1+NUM1+NUM2); } file.close(); tmpfile.seekg(0, ios::beg); ofile.open("F://book.dat"); ofile.seekp((count-1)*(NUM1+NUM1+NUM2+NUM2+NUM1+NUM1+NUM2),ios::beg); for (int i = 0; i < (DataCount - count); i++) { memset(TempBuf, 0, NUM1 + NUM1 + NUM2 + NUM2+NUM1+NUM1+NUM2); tmpfile.read(TempBuf, NUM1 + NUM2 + NUM1 + NUM2+NUM1+NUM1+NUM2); ofile.write(TempBuf, NUM1 + NUM1 + NUM2 + NUM2+NUM1+NUM1+NUM2); } } tmpfile.close(); ofile.close(); remove("temp.dat"); } void AddBook() { char ibookno[NUM2]; char iName[NUM1]; char ilsbn[NUM1]; char iPrice[NUM2]; char iAuthor[NUM2]; char itime[NUM1]; char ibanci[NUM1]; cout << "输入图书编号:" << endl; cin >> ibookno; cout << "输入书名:"<< endl; cin >> iName; cout << "输入ISBN编号:" << endl; cin >> ilsbn; cout << "输入价格:" << endl; cin >> iPrice; cout << "输入作者：" << endl; cin >> iAuthor; cout << "输入出版时间：" << endl; cin >> itime; cout << "输入版次：" << endl; cin >> ibanci; Book book(ibookno,iName, ilsbn, iPrice, iAuthor,itime,ibanci); book.WriteData(); cout << "Write Finish" << endl; Wait(); } long GetFileLength(ifstream &ifs) { long tmppos; long respos; tmppos = ifs.tellg(); ifs.seekg(0, ios::end); respos = ifs.tellg(); ifs.seekg(tmppos, ios::beg); return respos; } void WaitView(int page) { char a; cin >> a; if (a = 'n') { page = page + 1; } } void ViewData(int selpage = 1) { int page = 0; int curpage = 0; int datacount = 0; char inbookno[NUM2]; char inName[NUM1]; char inlsbn[NUM1]; char price[NUM2]; char inAuthor[NUM2]; char intime[NUM1]; char inbanci[NUM1]; bool index = false; int filelength; curpage = selpage; ifstream file; file.open("F://book.dat", ios::binary); filelength = GetFileLength(file); datacount = filelength/(NUM1+NUM1+NUM2+NUM2+NUM1+NUM1+NUM2); if (datacount >= 1)index = true; page = datacount / 20 + 1; ClearScreen(); cout << "共有记录" << datacount << " "; cout << "共有页数" << page << " "; cout << "当前页数" << curpage << " "; cout << " n： 显示下一页 m：返回" << endl; cout << setw(5) << "index"; cout << setw(10) << "BookNO"; cout << setw(20) << "Name" << setw(20) << "lsbn"; cout << setw(15) << "Price" << setw(15) << "Author"; cout << setw(15) << "Time" << setw(15) << "Banci"; cout << endl; try { file.seekg((curpage - 1) * 20 * (NUM1 + NUM1 + NUM2 + NUM2+NUM1+NUM1+NUM2), ios::beg); if (!file.fail()) { for (int i = 1; i < 21; i++) { memset(inbookno, 0, 20); memset(inName, 0, 128); memset(inlsbn, 0, 128); memset(price, 0, 50); memset(inAuthor, 0, 50); memset(intime, 0, 50); memset(inbanci, 0, 50); if (index) cout << setw(5) << (curpage - 1) * 20 + i; cout << setw(10); file.read(inbookno, NUM2); cout << inbookno; cout << setw(20); file.read(inName, NUM1); cout << inName; file.read(inlsbn, NUM1); cout << setw(20); cout << inlsbn; file.read(price, NUM2); cout << setw(15); cout << price; file.read(inAuthor, NUM2); cout << setw(15); cout << inAuthor; file.read(intime, NUM1); cout << setw(15); cout << intime; file.read(inbanci, NUM1); cout << setw(15); cout << inbanci; cout << endl; if (file.tellg() < 0)index = false; else index = true; } } } catch (...) { cout << "throw file exception" << endl; throw"file error occurred"; file.close(); } if (curpage < page) { curpage = curpage + 1; WaitView(curpage); } else WaitView(curpage); file.close(); } void DelectBookFromFile() { char bookno1[NUM2]; cout << "Input delect BookNO:" << endl; cin >> bookno1; int count = 0; fstream file; file.open("F://book.dat", ios::binary | ios::in | ios::out); file.seekg(0, ios::end); int res = file.tellg(); int a = NUM1 + NUM1 + NUM2 + NUM2 + NUM1 + NUM1 + NUM2; char buf[NUM2]; file.seekg(0, ios::beg); for (int j = NUM2; j <= res; j=j+a) { count += 1; file.seekg(NUM2,ios::cur); memset(buf, 0, NUM2); file.read(buf, NUM2); if(bookno1>=buf){ break; } file.seekg(a - NUM2, ios::cur); } file.close(); Book tmpbook; tmpbook.DeleteData(count); int count1 = 0; fstream file1; file1.open("F://Borrow