个人银行账户管理程序(C++语言程序设计第4版）

2021-12-14 13:03:16 阅读：137 来源： 互联网

标签：const 管理程序 int double C++ return Date date 程序设计

银行作业分享，欢迎批评指正。到第12章。
下滑左侧有目录，点击可直达。

Array.h

#pragma once
#ifndef ARRAY_H
#define ARRAY_H
#include<cassert>
template<class T>
class Array {
private:
	T* list;
	int size;
public:
	Array(int sz = 50);
	Array(const Array<T>& a);
	~Array();
	Array<T>& operator=(const Array<T>& rhs);
	T& operator[](int i);
	const T& operator[](int i)const;
	operator T* ();
	operator const T* ()const;
	int getSize()const;
	void resize(int sz);
};
template<class T>
Array<T>::Array(int sz) {
	assert(sz >= 0);
	size = sz;
	list = new T[size];
}
template<class T>
Array<T>::~Array() {
	delete[]list;
}
template<class T>
Array<T>::Array(const Array<T>& a) {
	size = a.size;
	list = new T[size];
	for (int i = 0; i < size; i++) {
		list[i] = a.list[i];
	}
}
template<class T>
Array<T>& Array<T>::operator=(const Array<T>& rhs) {
	if (&rhs != this) {
		if (size != rhs.size) {
			delete[]list;
			size = rhs.szie;
			list = new T[size];
		}
		for (int i = 0; i < size; i++) list[i] = rhs.list[i];
	}
	return*this;
}
template<class T>
T& Array<T>::operator[](int n) {
	assert(n >= 0 && n < size);
	return list[n];
}
template<class T>
const T& Array<T>::operator[](int n)const {
	assert(n >= 0 && n < size);
	return list[n];
}
template<class T>
Array<T>::operator T* () {
	return list;
}
template<class T>
Array<T>::operator const T* ()const {
	return list;
}
template<class T>
int Array<T>::getSize()const {
	return size;
}
template<class T>
void Array<T>::resize(int sz) {
	assert(sz >= 0);
	if (sz == size)return;
	T* newList = new T[sz];
	int n = (sz < size) ? sz : size;
	for (int i = 0; i < n; i++) newList[i] = list[i];
	delete[]list;
	list = newList;
	size = sz;
}
#endif  //ARRAY_H

accumulator.h

#pragma once
#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_

date.h

#pragma once
#ifndef _DATE_H_
#define _DATE_H_
#include<iostream>
class Date {
private:
	int year;
	int month;
	int day;
	int totalDays;
public:
	Date(int year=1, int month=1, int day=1);
	//static Date read();
	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;
	}
	int operator-(const Date& date)const {
		return totalDays - date.totalDays;
	}
	bool operator<(const Date& date)const {
		return totalDays < date.totalDays;
	}
};
std::istream& operator>>(std::istream& in, Date& date);
std::ostream& operator<<(std::ostream& out, const Date& date);
#endif // !_DATE_H_

account.h

#pragma once
#ifndef _ACCOUNT_H_
#define _ACCOUNT_H_
#include"date.h"
#include"accumulator.h"
#include<string>
#include<map>
#include<istream>
#include<stdexcept>
using namespace std;
class Account;
class AccountRecord {
private:
	Date date;
	const Account* account;
	double amount;
	double balance;
	std::string desc;
public:
	AccountRecord(const Date& date, const Account* account, double amount, double balance, const std::string& desc);
	void show()const;
};
typedef std::multimap<Date, AccountRecord>RecordMap;

class Account {
private:
	std::string id;
	double balance;
	static double total;
	static RecordMap recordMap;
protected:
	Account(const Date& date, const std::string& id);
	void record(const Date& date, double amount, const std::string& desc);
	void error(const std::string& msg)const;
public:
	const string& getId()const { return id; }
	double getBalance()const { return balance; }
	static double getTotal() { return total; }
	
	virtual void deposit(const Date& date, double amount, const std::string& desc ) = 0;
	virtual void withdraw(const Date& date, double amount, const std::string& desc ) = 0;
	virtual void settle(const Date& date) = 0;
	virtual void show( std::ostream &out)const;
	void show()const;
	static void query(const Date& begin, const Date& end);
};
inline std::ostream& operator<<(std::ostream & out, const Account& account) {
	account.show(out);
	return out;
}
class SavingsAccount :public Account {
private:
	double rate;
	Accumulator acc;
public:
	
	SavingsAccount(const Date& date, const string& id, double rate);
	double getRate()const { return rate; }
	void deposit(const Date& date, double amount, const string& desc);
	void withdraw(const Date& date, double amount, const string& desc);
	void settle(const Date& date);
};

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 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();
		else return credit;
	}
	void deposit(const Date& date, double amount, const string& desc);
	void withdraw(const Date& date, double amount, const string& desc);
	void settle(const Date& date);
	virtual void show(std::ostream &out)const;
};
class AccountException :public std::runtime_error {
private:
	const Account* account;
public:
	AccountException(const Account*account,const std::string&msg)
		:runtime_error(msg),account(account){}
	const Account* getAccount()const { return account; }
};


#endif // !_ACCOUNT_H_

account.cpp


#include"account.h"
#include<cmath>
#include<iostream>
#include<utility>
using namespace std;
using namespace std::rel_ops;
double Account::total = 0;
RecordMap Account::recordMap;

AccountRecord::AccountRecord(const Date& date, const Account* account, double amount, double balance, const std::string& desc)
	:date(date), account(account), amount(amount), balance(balance), desc(desc) {
	date.show();
	cout << "\t#" << account->getId() << "\t" << amount << "\t" << balance << "\t" << desc << endl;
}
void AccountRecord::show()const {
	cout << date << "\t#" << account->getId() << "\t" << amount << "\t" << balance << "\t" << desc << endl;
}


void Account::query(const Date& begin, const Date& end) {
	if (begin <= end) {
		RecordMap::iterator iter1 = recordMap.lower_bound(begin);
		RecordMap::iterator iter2 = recordMap.upper_bound(end);
		for (RecordMap::iterator iter = iter1; iter != iter2; ++iter) 
			iter->second.show();
		
	}
}
Account::Account(const Date& date, const string& id):id(id),balance(0) {
	
	cout <<date<< "\t# " << id << " created" << endl;
}
void Account::record(const Date& date, double amount, const string& desc) {
	AccountRecord* accountrecord;
	accountrecord = new AccountRecord(date, this, amount, this->getBalance(), desc);
	Account::recordMap.insert(make_pair(date, (*accountrecord)));

	amount = floor(amount * 100 + 0.5) / 100;
	balance += amount;
	total += amount;
	date.show();
	cout << "\t#" << id << "\t" << amount << "\t" << balance << "\t" << desc << endl;
}
void Account::show(ostream&out)const { out << id << "\tBalance:" << balance; }
void Account::show()const { cout << id << "\tBalance:" << balance; }

void Account::error(const string& msg)const {
	throw AccountException(this, msg);
}

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) {
	if (date.getMonth() == 1) {
		double interest = acc.getSum(date) * rate / (date - Date(date.getYear() - 1, 1, 1));
		if (interest != 0)
			record(date, interest, "interest");
		acc.reset(date, getBalance());
	}
}

CreditAccount::CreditAccount(const Date& date, const string& id, double credit, double rate, double fee) 
	:Account(date,id),credit(credit),rate(rate),fee(fee),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 creidt");
	}
	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, getDebt());
}

void CreditAccount::show(ostream&out)const {
	Account::show(out);
	out << "\tAvailable credit:" << getAvailableCredit();
}

date.cpp

#include"date.h"
#include<iostream>
#include<cstdlib>
#include<stdexcept>
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()) throw runtime_error("Invalid date");
	int years = year - 1;
	totalDays = years * 365 + years / 4 - years / 100 + years / 400 + DAYS_BEFORE_MONTH[month - 1] + day;
	if (isLeapYear() && month > 2)totalDays++;
}

istream& operator>>(istream& in, Date& date) {
	int year, month, day;
	char c1, c2;;
	in >> year >> c1 >> month >> c2 >> day;
	if (c1 != '-' || c2 != '-')throw runtime_error("Bad time format");
	date = Date(year, month, day);
	return in;
}


int Date::getMaxDay()const {
	if (isLeapYear() && month == 2)return 29;
	else return DAYS_BEFORE_MONTH[month] - DAYS_BEFORE_MONTH[month - 1];
}

void Date::show()const {
	cout << getYear() << "-" << getMonth() << "-" << getDay();
}

ostream& operator<<(ostream& out, const Date& date) {
	out << date.getYear() << "-" << date.getMonth() << "-" << date.getDay();
	return out;
}

main.cpp

#include"account.h"
#include<iostream>
#include<fstream>
#include<sstream>
#include<vector>
#include<algorithm>
using namespace std;
struct deleter {
	template<class T>void operator()(T* p) { delete p; }
};
class Controller {
private:
	Date date;
	vector<Account*>accounts;
	bool end;
public:
	Controller(const Date&date):date(date),end(false){}
	~Controller();
	const Date& getDate()const { return date; }
	bool isEnd()const { return end; }
	bool runCommand(const string& cmdLine);
};
Controller::~Controller() {
	for_each(accounts.begin(), accounts.end(), deleter());
}
bool Controller::runCommand(const string& cmdLine) {
	istringstream str(cmdLine);
	char cmd, type;
	int index, day;
	double amount, credit, rate, fee;
	string id, desc;
	Account* account;
	Date date1, date2;
	str >> cmd;
	switch (cmd) {
	case 'a':
		str >> type >> id;
		if (type == 's') {
			str >> rate;
			account = new SavingsAccount(date, id, rate);
		}
		else {
			str >> credit >> rate >> fee;
			account = new CreditAccount(date, id, credit, rate, fee);
		}
		accounts.push_back(account);
		return true;
	case 'd':
		str >> index >> amount;
		getline(str, desc);
		accounts[index]->deposit(date, amount, desc);
		return true;
	case 'w':
		str>> index >> amount;
		getline(str, desc);
		accounts[index]->withdraw(date, amount, desc);
		return true;
	case 's':
		for (size_t i = 0; i < accounts.size(); i++) {
			cout << "[" << i << "]";
			accounts[i]->show();
			cout << endl;
		}
		return false;
	case 'c':
		str >> day;
		if (day < date.getDay())cout << "You cannot specify a previous day";
		else if (day > date.getMaxDay())cout << "Invalid day";
		else date = Date(date.getYear(), date.getMonth(), day);
		return true;
	case 'n':
		if (date.getMonth() == 12)date = Date(date.getYear() + 1, 1, 1);
		else date = Date(date.getYear(), date.getMonth() + 1, 1);
		for (vector<Account*>::iterator iter = accounts.begin(); iter != accounts.end(); ++iter) {
			(*iter)->settle(date);
		}
		return true;
	case 'q':                                                                                      
		str >> date1 >> date2;
		Account::query(date1, date2);
		return false;
	case 'e':
		end = true;
		return false;
	}
	cout << "Invalid command:" << cmdLine << endl;
	return false;
}

int main(void) {
	Date date(2008,11,1);
	Controller controller(date);
	string cmdLine;
	const char* FILE_NAME = "commands.txt";
	ifstream fileIn(FILE_NAME);
	if (fileIn) {
		while (getline(fileIn, cmdLine)){
			try {
				controller.runCommand(cmdLine);
			}
			catch (exception& e) {
				cout << "Bad line in " << FILE_NAME << ": " << cmdLine << endl;
				cout << "Error: " << e.what() << endl;
				return 1;
			}
		}
		fileIn.close();
	}
	ofstream fileOut(FILE_NAME, ios_base::app);
	cout << "(a)add account (d)deposit (w)withdraw (s)show (c)change day (n)next month (q)query (e)exit" << endl;
	while (!controller.isEnd()) {
		cout << controller.getDate() << "\tTotal:" << Account::getTotal() << "\tcommand>";
		string cmdLine;
		getline(cin, cmdLine);
		try {
			if (controller.runCommand(cmdLine))fileOut << cmdLine << endl;
		}
		catch (AccountException& e) {
			cout << "Error(#" << e.getAccount()->getId() << "):" << e.what() << endl;
		}
		catch (exception& e) {
			cout << "Error:" << e.what() << endl;
		}
	}
	return 0;
}

commands.txt

a s 02342342 0.015
a c C5392394 10000 0.0005 50
a c C5392394 10000 0.0005 50
d 0 5000 salary
c 15
w 2 2000 buy a cell
c 25
d 1 10000 sell stock 0323
n
d 2 2016 repay the credit
c 5
d 0 5500 salary
n
w 2 20000 buy a car
w 2 1500 buy a television
q 2008-12-5 2009-1-32
q 2008-12-5 2009-1-31
e

标签：const,管理程序,int,double,C++,return,Date,date,程序设计
来源： https://blog.csdn.net/weixin_50478589/article/details/121924612

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