某南大学暑期学校 qt 大作业：银行管理系统.zip

/************************************************************************ * Copyright (C) 2021 Chenyang https://wcy-dt.github.io * * * * @file bankdb.cpp * * @brief Bankdb simulates a database for the project. The speed of * * this database is slow for that we must ensure the safety * * of every deal. * * @author Chenyang * * @date 2021 - 07 * ************************************************************************/ #include "bankdb.h" #include <QDebug> #include <QDialog> #include <QMessageBox> #include <fstream> #include <map> #include <time.h> using namespace std; /** * @brief initialization and read from the file */ bankdb::bankdb() { GetFile(); } /** * @brief read from the file which stores the data */ void bankdb::GetFile() { vAccount.clear(); mAccount.clear(); mMoney.clear(); int iNumOfAccounts; /// number of accounts int iNumOfFlow; /// number of flows ifstream iFile("bankdb.db", ios::binary); if (!iFile) /// the file not exist { iNumOfAccounts = 0; /// zero account WriteFile(); return; } iFile >> iNumOfAccounts; for (int i = 0; i < iNumOfAccounts; i++) { accountInfo tmpAccount; /// get a record, and pushback to vector string strTmpString; /// for the convenience of infile /** * @note here i use a lot of getline(), for that spaces may exist in the strings * getline(iFile, strTmpString) is for jump over ENTER */ iFile >> tmpAccount.strNumber; getline(iFile, strTmpString); getline(iFile, tmpAccount.strName); getline(iFile, tmpAccount.strPasswd); getline(iFile, tmpAccount.strAddress); iFile >> tmpAccount.iType >> tmpAccount.dInterest >> tmpAccount.bLost >> tmpAccount.tLostTime; getline(iFile, strTmpString); getline(iFile, tmpAccount.strOperator); iFile >> iNumOfFlow; mMoney[tmpAccount.strNumber] = 0; /// initialize the money in the account for (int j = 0; j < iNumOfFlow; j++) { flowInfo tmpFlow; /// get a flow, and pushback to vector iFile >> tmpFlow.tTime >> tmpFlow.dMoney >> tmpFlow.iOperationType; getline(iFile, strTmpString); getline(iFile, tmpFlow.strOperator); if (tmpFlow.iOperationType == 0) /// deposit mMoney[tmpAccount.strNumber] += tmpFlow.dMoney; else /// withdraw mMoney[tmpAccount.strNumber] -= tmpFlow.dMoney; tmpAccount.vFlow.push_back(tmpFlow); } mAccount[tmpAccount.strNumber] = vAccount.size(); /// map account number to the index /// @see bankdb.h vAccount.push_back(tmpAccount); } } /** * @brief write data to the file */ void bankdb::WriteFile() { int iNumOfAccounts = vAccount.size(); /** * @note use trunc for that it is not much slower than find where to insert or edit */ ofstream oFile("bankdb.db", ios::trunc | ios::binary); oFile << iNumOfAccounts << "\n"; for (int i = 0; i < iNumOfAccounts; i++) { accountInfo tmpAccount = vAccount[i]; int iNumOfFlow = tmpAccount.vFlow.size(); oFile << tmpAccount.strNumber << "\n" << tmpAccount.strName << "\n" << tmpAccount.strPasswd << "\n" << tmpAccount.strAddress << "\n" << tmpAccount.iType << "\n" << tmpAccount.dInterest << "\n" << tmpAccount.bLost << "\n" << tmpAccount.tLostTime << "\n" << tmpAccount.strOperator << "\n" << iNumOfFlow << "\n"; for (int j = 0; j < iNumOfFlow; j++) { flowInfo tmpFlow = tmpAccount.vFlow[j]; oFile << tmpFlow.tTime << "\n" << tmpFlow.dMoney << "\n" << tmpFlow.iOperationType << "\n" << tmpFlow.strOperator << "\n"; } } } /** * @brief add an account * * @param [in] strNum number of the account * @param [in] strNam name of the account owner * @param [in] strPas password of the account * @param [in] strAdd address of the account owner * @param [in] iType type of the account * @param [in] dInt interest of the account * @param [in] strOpe operator of the deal * * requirments of these params @see bankdb.h */ void bankdb::AddAccount(string strNum, string strNam, string strPas, string strAdd, int iTyp, double dInt, string strOpe) { accountInfo tmpAccountInfo; tmpAccountInfo.strNumber = strNum; tmpAccountInfo.strName = strNam; tmpAccountInfo.strPasswd = strPas; tmpAccountInfo.strAddress = strAdd; tmpAccountInfo.iType = iTyp; tmpAccountInfo.dInterest = dInt; tmpAccountInfo.bLost = false; tmpAccountInfo.tLostTime = time(nullptr); tmpAccountInfo.strOperator = strOpe; vAccount.push_back(tmpAccountInfo); vAccount[vAccount.size() - 1].vFlow.clear(); /** * @note do not delete Getfile()! * i do not think it is necessary, but without it the program has bugs * it is to refresh the memory */ WriteFile(); GetFile(); } /** * @brief edit an account * * @param [in] strNum number of the account [unchangable] * @param [in] strNam name of the account owner * @param [in] strAdd address of the account owner * @param [in] iType type of the account * @param [in] dInt interest of the account * * requirments of these params @see bankdb.h */ void bankdb::EditAccount(string strNum, string strNam, string strAdd, int iTyp, double dInt) { vAccount[mAccount[strNum]].strName = strNam; vAccount[mAccount[strNum]].strAddress = strAdd; vAccount[mAccount[strNum]].iType = iTyp; vAccount[mAccount[strNum]].dInterest = dInt; WriteFile(); GetFile(); } /** * @brief edit password * * @param [in] strNum number of the account [unchangable] * @param [in] strPas password of the account * * requirments of these params @see bankdb.h */ void bankdb::EditPasswd(string strNum, string strPas) { vAccount[mAccount[strNum]].strPasswd = strPas; WriteFile(); } /** * @brief marked as lost * * @param [in] strNum number of the account [unchangable] * @param [in] tTim time of the operation * * requirments of these params @see bankdb.h */ void bankdb::SetLost(string strNum, time_t tTim) { vAccount[mAccount[strNum]].bLost = true; vAccount[mAccount[strNum]].tLostTime = tTim; WriteFile(); } void bankdb::RidLost(string strNum) { vAccount[mAccount[strNum]].bLost = false; vAccount[mAccount[strNum]].tLostTime = 0; WriteFile(); } /** * @brief judge whether the account exists * * @param [in] strNum number of the account * * @retval true finded * false not finded */ bool bankdb::ExistAccount(string strNumber) { /** * @note a common way to find sth. in a map */ map<string, int>::iterator iter; iter = mAccount.find(strNumber); return (iter != mAccount.end()); } /** * @brief judge whether the account number matches the password * * @param [in] strNumber number of the account * @param [in] strPasswd password of the account * * @retval true match * false not match */ bool bankdb::CheckAccount(string strNumber, string strPasswd) { if (!ExistAccount(strNumber)) /// the account does not exist return false; return (vAccount[mAccount[strNumber]].strPasswd == strPasswd); } /** * @brief get name by the account number * * @param [in] strNum number of the account * * @return the name @see bandb.h */ strin