//account.cpp
#include"account.h"
#include<cmath>
#include<iostream>
using namespace std;double Account::total = 0;
//Account类相关成员函数的实现
Account::Account(const Date &date, const string &id) : id(id), balance(0) {date.show();cout << "\t#" << id << "  created" << endl;}
void Account::record(const Date &date, double amount, const string &desc){amount = floor(amount * 100 + 0.5) / 100; //保留小数点后两位balance += amount;total += amount;date.show();cout << "\t#" << id << "\t" << amount << "\t" << balance << "\t" << desc << endl;}
void Account::show() const
{cout << id << "\tBalance:" << balance;
}void Account::error(const string &msg)const{cout << "Error(#" << id << "):" << msg << endl;}//SavingsAccount类相关成员函数的实现SavingsAccount::SavingsAccount(const Date &date, const string &id, double rate) : Account(date,id), rate(rate), acc(date,0)
{}void SavingsAccount::deposit(const Date &date, double amount, const string &desc){record(date, amount, desc);acc.change(date, getBalance());
}void SavingsAccount::withdraw(const Date &date, double amount, const string &desc){if (amount > getBalance()) {error("not enough money");
}else {record(date, -amount, desc);acc.change(date, getBalance());}
}void SavingsAccount::settle(const Date &date){double interest = acc.getSum(date)*rate / date.distance(Date(date.getYear() - 1, 1, 1)); //计算年息if (interest != 0)record(date, interest, "interest");acc.reset(date,getBalance());}
CreditAccount::CreditAccount(const Date &date, const std::string &id, double credit, double rate, double fee): Account(date, id), credit(credit), fee(fee), rate(rate), acc(date, 0) {}
void CreditAccount::deposit(const Date &date, double amount, const string &desc){record(date, amount, desc);acc.change(date, getDebt());
}void CreditAccount::withdraw(const Date &date, double amount, const string &desc){if (amount-getBalance() > credit) {error("not enough credit");}else {record(date, -amount, desc);acc.change(date, getDebt());}
}
void CreditAccount::settle(const Date &date){double interest = acc.getSum(date)*rate;if (interest != 0)record(date, interest, "interest");if (date.getMonth() == 1)record(date, -fee, "annual fee");acc.reset(date, getBalance());}
void CreditAccount::show() const
{Account::show();cout << "\tAvailable credit: " << getAvailableCredit();
}

// account.h : Defines the entry point for the console application.#ifndef _ACCOUNT_H_#define _ACCOUNT_H_#include"date.h"
#include"accumulator.h"
#include<string>class Account //储蓄账户类{private:std::string id; //账号double balance; //余额static double total; //所有账户的总金额
protected:Account(const Date&date, const std::string &id);//记录一笔账，date为日期，desc为说明,amount为金额void record(const Date &date, double amount, const std::string &desc);//报告错误信息void error(const std::string &msg)const;public://构造函数const std::string &getId() const { return id; }double getBalance() const { return balance; }static double getTotal() { return total; }void show() const;//显示账户信息
};
class SavingsAccount:public Account{
private:Accumulator acc;double rate;
public:SavingsAccount(const Date &date, const std::string &id, double rate);double getRate() const { return rate; }void deposit(const Date &date, double amount, const std::string &desc); //存入现金void withdraw(const Date &date, double amount, const std::string &desc); //取出现金void settle(const Date &date);//结算利息，每年1月1日调用一次该函数};
class CreditAccount :public Account {
private:Accumulator acc;double credit;double rate;double fee;double getDebt()const {double balance = getBalance();return(balance < 0 ? balance : 0);}
public:CreditAccount(const Date &date, const std::string &id, double credit, double rate, double fee);double getCredit() const { return credit; }double getRate() const { return rate; }double getFee() const { return fee; }double getAvailableCredit() const {if (getBalance() < 0)return credit + getBalance();elsereturn credit;}void deposit(const Date &date, double amount, const std::string &desc); //存入现金void withdraw(const Date &date, double amount, const std::string &desc); //取出现金void settle(const Date &date);//结算利息，每年1月1日调用一次该函数void show() const;//显示账户信息};#endif//_ACCOUNT_H_

//accumulator.h
#ifndef _ACCUMULATOR_H_
#define  _ACCUMULATOR_H_
#include"date.h"
class Accumulator {
private:Date lastDate;double value;double sum;
public:Accumulator(const Date&date,double value):lastDate(date),value(value),sum(0){}double getSum(const Date &date)const {return sum + value*date.distance(lastDate);}void change(const Date&date, double value) {sum = getSum(date);lastDate = date;this->value = value;}void reset(const Date&date, double value) {lastDate = date;this->value = value;sum = 0;}
};
#endif // _ACCUMULATOR_H_

// chapter07银行账户.cpp : Defines the entry point for the console application.
//// chapter06.cpp : Defines the entry point for the console application.
//7_10.cpp//#include"account.h"
#include"account.h"
#include"date.h"
#include<iostream>
using namespace std;int main() {Date date(2008, 11, 1);//建立几个账户SavingsAccount sa1(date, "03755217", 0.015);SavingsAccount sa2(date, "02342342", 0.015);CreditAccount ca(date, "C5392394", 10000, 0.0005, 50);//11月的几笔账目sa1.deposit(Date(2008, 11, 5), 5000, "salary");ca.withdraw(Date(2008, 11, 15), 2000, "buy a phone");sa2.deposit(Date(2008, 11, 25), 10000, "sell stock 0323");//结算信用卡ca.settle(Date(2008, 12, 1));//12月的几笔账目ca.deposit(Date(2008, 12, 1), 2016, "repay the credit");sa1.deposit(Date(2008, 12, 1), 5500, "salary");//结算所有的账户并输出各个账户信息sa1.settle(Date(2009, 1, 1));sa2.settle(Date(2009, 1, 1));ca.settle(Date(2009, 1, 1));cout << endl;sa1.show();cout << endl;sa2.show();cout << endl;ca.show();cout << endl;cout << "Total: " << Account::getTotal() << endl;return 0;
}

//date.cpp#include"date.h"
#include<iostream>
#include<cstdlib>
using namespace std;
namespace {const int DAYS_BEFORE_MONTH[] = { 0,31,59,90,120,151,181,212,243,273,304,334,365 };
}
Date::Date(int year, int month, int day) :year(year), month(month), day(day) {if (day <= 0 || day > getMaxDay()) {cout << "Invalid date: ";show();cout << endl;exit(1);}int years = year - 1;totalDays = year * 365 + years / 4 - years / 100 + years / 400 + DAYS_BEFORE_MONTH[month - 1] + day;if (isLeapYear() && month > 2) totalDays++;
}
int Date::getMaxDay()const {if (isLeapYear() && month == 2)return 29;elsereturn DAYS_BEFORE_MONTH[month] - DAYS_BEFORE_MONTH[month - 1];
}
void Date::show() const {cout << getYear() << "-" << getMonth() << "-" << getDay();
}

//date.h#ifndef _DATE_H_
#define _DATE_H_
class Date {
private:int year;int month;int day;int totalDays;
public:Date(int year, int month, int day);int getYear()const { return year; }int getMonth() const { return month; }int getDay()const { return day; }int getMaxDay()const;bool isLeapYear()const {return year % 4 == 0 && year % 100 != 0 || year % 400 == 0;}void show()const;int distance(const Date &date)const {return totalDays - date.totalDays;}
};
#endif // !_DATE_H_