具有多态性的银行系统程序C++

1、使用习题12.10中创建的Account类层次结构开发一个具有多态性的银行系统程序。创建一个Account指针的vector对象，其中的指针指向SavingsAccount 对象和CheckingAccount对象。对于该vector对象中每个Account ，允许用户使用成员函数debit指定要从Account取出的货币金额，并允许用户使用成员函数credit指定要存入该Account的货币金额。处理每个Account时，应判定它的类型。如果Account是SavingsAccount，就使用成员函数，就使用成员函数calculateInterest计算该Account应得的利息，然后使用成

2、员函数credit把利息加到帐户余额上。处理完一个Account后，通过调用基类成员函数getBalance打印更新后的帐户余额。Account.h#ifndef ACCOUNT_H#define ACCOUNT_Hclass Accountpublic:Account( double = 0 );virtual bool credit( double );virtual bool debit( double );virtual double getBalance()return balance;private:double balance;#endifAccount.cpp#include

3、<iostream>using std:endl;using std:cout;#include "Account.h"Account:Account( double YuE )if( YuE >= 0 )balance = YuE;elsebalance = 0;cout << "Unvalid input! Balance is setted to 0! " << endl; / 不合要求输出提示信息bool Account:credit( double deposit ) / 存钱cout <<

4、 "you are crediting or get interest " << deposit << " yuan" << endl;if( deposit >= 0 )balance += deposit;return true;elsecout << "Wrong deposit! You can't deposit less than 0 yuan! " / 不合要求输出提示信息return false;bool Account:debit( double with

5、draw ) / 取钱cout << "you are debiting or paying the fee charged for this transaction " << withdraw << " yuan" << endl;if ( withdraw >= 0 && withdraw <= balance )balance -= withdraw;return true;elsecout << "Debit amount exceeded acco

6、unt balance, or you wrongly withdraw less than 0 yuan!" / 不合要求输出提示信息return false;SavingAccount.h#ifndef SAVINGACCOUNT_H#define SAVINGACCOUNT_H#include "Account.h"class SavingAccount:public Accountpublic:SavingAccount( double = 0, double = 0 );double calculateInterest() / 计算利息return in

7、terestrate * getBalance();private:double interestrate;#endifSavingAccount.cpp#include <iostream>using std:endl;using std:cout;#include "SavingAccount.h"SavingAccount:SavingAccount( double YuE, double LiLv ):Account( YuE ) / 为基类中的数据成员初始化if( LiLv >= 0 && LiLv <= 1 )intere

8、strate = LiLv;elseinterestrate = 0;cout << "Unvalid input! Interestrate is setted to 0! " << endl; / 不合要求输出提示信息cout << "saving interestrate is " << interestrate << endl;CheckingAccount.h#ifndef CHECKINGACCOUNT_H#define CHECKINGACCOUNT_H#include "

9、;Account.h"class CheckingAccount:public Accountpublic:CheckingAccount( double = 0, double = 0 );virtual bool credit( double );virtual bool debit( double );private:double feechargedpertransaction;#endifCheckingAccount.cpp#include <iostream>using std:endl;using std:cout;#include "Check

10、ingAccount.h"CheckingAccount:CheckingAccount( double YuE, double JiaoYiFei ) / 构造函数初始化余额和交易额:Account( YuE )if( JiaoYiFei >= 0 )feechargedpertransaction = JiaoYiFei;elsefeechargedpertransaction = 0;cout << "Unvalid input! Feechargedpertransaction is setted to 0! " << end

11、l; / 不合要求输出提示信息cout << "fee charged for per transaction is " << feechargedpertransaction << endl;bool CheckingAccount:credit( double deposit ) / 存钱交易if( Account:credit( deposit ) = true ) / 收取交易费相当于取钱Account:debit( feechargedpertransaction );return true;elsecout <<

12、"Trade Faided! " << endl;return false;bool CheckingAccount:debit( double withdraw ) / 取钱交易if ( Account:debit( withdraw ) = true )Account:debit( feechargedpertransaction ); / 同理 收取交易费相当于取钱return true;elsecout << "Trade Faided!" << endl;return false;test_Account.c

13、pp#include <iostream>using std:endl;using std:cout;using std:cin;#include <vector>using std:vector;#include <typeinfo>#include "Account.h"#include "SavingAccount.h"#include "CheckingAccount.h"void virtualViaPointer( Account * const, SavingAccount &

14、, CheckingAccount & );/用户通过此自定义函数进行交易int main()/初始化各个账户Account account( 2000.0 ); SavingAccount saving( 2000,0.1);CheckingAccount checking( 5000, 2 );vector < Account * > accounts(3);/用vector指针指向各个账户accounts0 = &account;accounts1 = &saving;accounts2 = &checking;for(int i = 0; i

15、 < 3; i+) /每个账户轮流执行交易virtualViaPointer( accountsi, saving, checking );return 0;void virtualViaPointer( Account * const baseClassPtr , SavingAccount & s, CheckingAccount & c)int t = 1, n;/通过比较是否指向同一个地址判断账户的类型是否相同if( baseClassPtr = &s )cout << "nis SavingAccountn"cout &l

16、t;< "SavingAccount before operation is " << baseClassPtr->getBalance() << endl;else if( baseClassPtr = &c )cout << "nis CheckingAccountn"cout << "CheckingAccount before operation is " << baseClassPtr->getBalance() << endl

17、;elsecout <<"nis Accountn"cout << "Account before operation is " << baseClassPtr->getBalance() << endl;while( t = 1 | t = 2 )cout << "n请选择服务：1:存款 2:取款 其他键:退卡. " << endl;cin >> t;switch(t)case 1: cout << "请输入存款数：&qu

18、ot;cin >> n;cout << endl;baseClassPtr->credit( n );if( baseClassPtr = &s )SavingAccount *savingPtr = (SavingAccount*)baseClassPtr;/向下强制类型转换 来调用派生类中有而基类没有的函数baseClassPtr->credit( savingPtr->calculateInterest() );break;case 2: cout << "请输入取款数："cin >> n;cout << endl;baseClassPtr->debit( n );break;default: cout << "you suc