3.hpp
#include<iostream>
#include<string>
using namespace std;
class MachinePets {
public:
MachinePets(const string s);
MachinePets();
string get_nickname() const;
public:
virtual string talk() = 0;
protected:
string nickname;
};
MachinePets::MachinePets(const string s) {
nickname = s;
}
MachinePets::MachinePets():nickname(nickname){
}
string MachinePets::get_nickname() const{
return nickname;
}
class PetCats :public MachinePets {
public:
PetCats(const string s);
public:
string talk() override;
};
PetCats::PetCats(const string s){
nickname = s;
}
string PetCats::talk() {
return "miao wu~";
}
class PetDogs :public MachinePets {
public:
PetDogs(const string s);
public:
string talk() override;
};
PetDogs::PetDogs(const string s){
nickname = s;
}
string PetDogs::talk() {
return "wang wang~";
}
3.cpp
#include <iostream>
#include "pets.hpp"
void play(MachinePets &obj) {
std::cout << obj.get_nickname() << " says " << obj.talk() << std::endl;
}
void test() {
PetCats cat("miku");
PetDogs dog("da huang");
play( cat );
play( dog );
}
int main() {
test();
}
4.hpp
#include<iostream>
#include<vector>
#include<string>
using namespace std;
class Person {
public:
Person();
Person(string n, string t,string e=0);
Person(const Person& p);
void update_telephone();
void update_email();
friend istream& operator>>(istream& is, Person& p);
friend ostream& operator<<(ostream& os, Person& p);
friend bool operator==(const Person& a, const Person& b);
private:
string name;
string telephone;
string email;
};
Person::Person() {}
Person::Person(string n, string t, string e) {
name = n;
telephone = t;
email = e;
}
Person::Person(const Person& p) {
this->name = p.name;
this->telephone = p.telephone;
this->email = p.email;
}
void Person::update_telephone() {
string m = "19218132577";
cin >> m;
cout << "输入电话号码:" <<m<< endl;
cout << "电话号码已更新" << endl;
}
void Person::update_email() {
string n = "[email protected]";
cin >> n;
cout << "输入email地址:" <<n<< endl;
cout << "email地址已更新" << endl;
}
istream& operator>>(istream& is, Person& p) {
is >> p.name >> p.telephone >> p.email;
return is;
}
ostream& operator<<(ostream& os, Person& p) {
os << p.name << p.telephone << p.email;
return os;
}
bool operator==(const Person& a, const Person& b) {
return(a.name == b.name);
}
4.cpp
#include <iostream>
#include <vector>
#include "Person.hpp"
void test() {
using namespace std;
vector<Person> phone_book;
Person p;
cout << "输入一组联系人的联系方式，E直至按下Ctrl+Z终止\n";
while(cin >> p)
phone_book.push_back(p);
cout << "\n更新phone_book中索引为0的联系人的手机号、邮箱:\n";
phone_book.at(0).update_telephone();
phone_book.at(0).update_email();
cout << "\n测试两个联系人是否是同一个:\n";
cout << boolalpha << (phone_book.at(0) == phone_book.at(1)) << endl;
}
int main() {
test();
}
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 || yeat % 400 == 0;
}
void show()const;
int operator-(const Date& date)const {
return totalDays - date.totalDays;
}
};
#endif//_ _DATE_H_ _
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 = years * 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;
}
else
return DAYS_BEFORE_MONTH[month] - DAYS_BEFORE_MONTH[month - 1];
}
void Date::show()const {
cout << getYear() << "-" << getMonth() << "-" << getDay();
}
accumulator.h
#ifndef_ _ACCUMULATOR_H_ _
#define_ _ACCUMULATOR_H_ _
#include"date.h"
class accumulator
{
private:
Date lastDate;
double value;
double sum;
public:
double qetSum(const Date& date) const {
return sum + value * (date - lastDate);
}
accumulator(const Date& date, double value) :lastDate(date),value(value),sum(0) {
}
void change(const Date& date, double value) {
sum = qetSum(date);
lastDate = date;
this->value = value;
}
void reset(const Date& date, double value) {
lastDate = date;
this->value = value;
sum = 0;
}
};
account.h
#ifdef_ _ACCOUNT_H_ _
#define_ _ACCOUNT_H_ _
#include"date.h"
#include"accumulator.h"
#include<string>
#include"date.h"
class Account
{
private:
std::string id;
double balance;
static double total;
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 std::string & getId() const { return id; }
double getBalance() const { return balance; }
static double getToal() { 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);
virtual void show() const;
};
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);
void withdraw(const Date & date, double amount, const std::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 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();
else
return credit;
}
void deposit(const Date & date, double amount, const std::string & desc);
void withdraw(const Date & date, double amount, const std::string & desc);
void settle(const Date & date);
void show() const;
};
account.cpp
#include"account.h"
#include<cmath>
#include<iostream>
using namespace std;
double Account::total = 0;
Account::Account(const Date & date, const std::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;
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::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 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, getDebt());
}
void CreditAccount::show() const
{
Account::show();
cout << "\tAvailable credit:" << getAvailableCredit();
}
cpp
#include"account.h"
#include<iostream>
using namespace std;
int main()
{
Date date(2008, 11, 1);
SavingsAccount sa1(date, "s3755217", 0.015);
SavingsAccount sa2(date, "02342342", 0.015);
CreditAccount ca(date, "C5392394", 10000, 0.0005, 50);
Account * accounts[] = { &sa1,&sa2,&ca };
const int n = sizeof(accounts) / sizeof(Account*);
cout << "(d)deposit(w)withdraw(s)show(c)change day(n) next month(e) exit" << endl;
char cmd;
do {
date.show();
cout << "\tTotal:" << Account::getToal() << "\tcommand";
int index, day;
double amount; string desc;
cin >> cmd;
switch (cmd)
{
case'd':
cin >> index >> amount;
getline(cin, desc);
accounts[index]->deposit(date, amount, desc);
break;
case'w':
cin >> index >> amount;
getline(cin, desc);
accounts[index]->withdraw(date, amount, desc);
break;
case's':
for (int i = 0; i < n; i++)
{
cout << "[" << i << "]";
accounts[i]->show();
cout << endl;
}
break;
case'c':
cin >> 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);
break;
case'n':
if (date.getMonth() == 12)
date = Date(date.getYear() + 1, 1, 1);
else
date = Date(date.getYear(), date.getMonth() + 1, 1);
for (int i = 0; i < n; i++)
accounts[i]->settle(date);
break;
}
} while (cmd != 'e');
return 0;
}
标签：const,string,double,void,Date,实验,date From： https://www.cnblogs.com/32re/p/17872231.html