任务5：
1 #ifndef_ _DATE_H_ _
2 #define_ _DATE_H_ _
3 class Date{
4 private:
5 int year;
6 int month;
7 int day;
8 int totalDays;
9 public:
10 Date(int year,int month,int year);
11 int getYear() const{return year;}
12 int getMonth() const{return month;}
13 int getDay() const{return day;}
14 int getMaxDay() const;
15 bool isLeapYear() const{
16 return year%4==0&&year%100!=0||year%400==0;}
17 void show() const;
18 int distance(const Date& date) const{
19 return totalDays-date.totalDays;}
20 int operator-(const Date& date) const{
21 return tptalDays-date.totalDays;}
22 };
23 #endif
date.h
1 #include"date.h"
2 #include<iostream>
3 #include<cstdlib>
4 using namespace std;
5 namespace{
6 const int DAYS_BEFORE_MONTH[]={0,31,59,90,120,151,181,212,243,273,304,334,365};
7
8 }
9 Date::Date(int year,int month,int day):year(year),month(month),day(day){
10 if(day<=0||day>getMaxDay()){
11 cout<<"Invalid date: ";
12 show();
13 cout<<endl;
14 exit(1);
15 }
16 int years=year-1;
17 totalDays=years*356+years/4-years/100+years/400+DAYS_BEFORE_MONTH[month-1]+day;
18 if(isLeapYear()&&month>2) totalDays++;
19 }
20 int Date::getMaxDay() const{
21 if(isLeapYear()&&month==2)
22 return 29;
23 else
24 return DAYS_BEFORE_MONTH[month]-DAYS_BEFORE_MONTH[month-1];}
25 void Date::show() const {
26 cout<<getYear()<<"-"<<getMonth()<<"-"<<getDay();}
date.cpp
1 #ifndef_ _ACCUMULATOR_H_ _
2 #define_ _ACCUMULATOR_H_ _
3 #include"date.h"
4 class Accumulator{
5 private:
6 Date lastDate;
7 double value;
8 double sum;
9 public:
10 double getSum(const Date &date) const{
11 return sum+value*(date-lastDate);}
12 Accumulator(const Date &date,double value)
13 :lastDate(date),value(value),sum(0){
14 }
15 double getSum(const Date& date) const{
16 return sum+value*date.distance(lastDate);}
17 void change(const Date &date,double value){
18 lastDate=date;this->value=value;
19 }
20 void reset(const Date& date,double value){
21 lastDate=date;this->value=value;sum=0;
22 }
23 };
24 #endif
accumulator.h
1 #ifndef_ _ACCOUNT_H_ _
2 #define_ _ACCOUNT_H_ _
3 #include"date.h"
4 #include"accumulator.h"
5 #include<string>
6 class Account{
7 private:
8 std::string id;
9 double balance;
10 static double total;
11 protected:
12 Account(const Date &date,const std::string &id);
13 void record(const Date &date,double amount ,const std::string &desc);
14 void error(const std::string &msg) const;
15 public:
16 const std::string &getId() const{return id;}
17 public:
18 const std::string &getId() const{return id;}
19 double getBalance() const{return balance;}
20 static double getTotal() {return total;
21 }
22 virtual void deposit(const Date &date,double amount,const std::string &desc)=0;
23 virtual void withdraw(const Date &date,double amount,const std::string &desc)=0;
24 virtual void settle(const Date &date)=0;
25 virtual void show() const;
26 };
27 class SavingAccount:public Account{
28 private:
29 Accumulator acc;
30 double rate;
31 public:
32 SavingAccount(const Date &date,const std::string &id,double rate);
33 double getRate() const{return rate;}
34 void deposit(const Date &date,double amount,const std::string &desc);
35 void withdraw(const Date &date,double amount,const std::string &desc);
36 void settle(const Date &date);
37
38 };
39 class CreditAccount:public Account{
40 private:
41 Accumulator acc;
42 double credit;
43 double rate;
44 double fee;
45 double getDebt() const{
46 double balance=getBalance();
47 return (balance<0?balance:0);}
48 public:
49 CreditAccount(const Date &date,const std::string &id,double credit,double rate,double fee);
50 double getCredit() const{return credit;}
51 double getRate() const{return rate;}
52 double getFee() const{return fee;}
53 double getAvailableCredit() const{
54 if(getBalance()<0)
55 return credit+getBalance();
56 else
57 return credit;}
58 void deposit(const Date &date,double amount,const std::string &desc);
59 void withdraw(const Date &date,double amount,const std::string &desc);
60 void settle(const Date &date);
61 void show() const;
62
63 };
account.h
1 #include"account.h"
2 #include<cmath>
3 #include<iostream>
4 using namespace std;
5 double Account::total=0;
6 Account::Account(const Date &date,const string &id):id(id),balance(0){
7 date.show()
8 ;cout<<"\t#"<<id<<"created"<<endl;}
9 void Account::record(const Date &date,double amount ,const string &desc){
10 amount=floor(amount*100+0.5)/100;
11 balance+=amount;total+=amount;
12 date.show()
13 ;cout<<"\t#"<<id<<"\t"<<amount<<"\t"<<balance<<"\t"<<desc<<endl;}
14 void Account::show() const{cout<<id<<"\tBalance: "<<balance;}
15 void Account::error(const string &msg) const{
16 cout<<"Error(#"<<id<<"): "<<msg<<endl;}
17 SavingsAccount::SavingsAccount(const Date &date,const string &id,double rate):
18 Account(date,id),rate(rate),acc(date,0){
19 }
20 void SavingsAccount::deposit(const Date &date,double amount,const string &desc){
21 record(date,amount,desc);
22 acc.change(date,getBalance());
23 }
24 void SavingsAccount::withdraw(const Date &date,double amount,const string &desc){
25 if(amount>getBalance()){
26 error("not enough money");
27
28 }else{
29 record(date,-amount,desc);
30 acc.change(date,getBalance());
31 }
32 }
33 void SavingsAccount::settle(const Date &date){
34 if(date.getMonth()==1){
35 double interest=acc.getSum(date)*rate/(date-Date(date.getYear()-1,1,1));
36 if(interest!=0)
37 record(date,interest,"interest");
38 acc.reset(date,getBalance());
39 }
40 }
41 CreditAccount::CreditAccount(const Date& date,const string &id,double credit,double rate,double fee)
42 :Account(date,id),credit(credit),rate(rate),fee(fee),acc(date,0){
43 }
44 void CreditAccount::deposit(const Date &date,double amount,const string &desc){
45 if(amount-getBalance()>credit){
46 error("not enough credit");
47
48 }else {
49 record(date,-amount,desc);
50 acc.change(date,getDebt());
51 }
52 }
53 void CreditAccount::settle(const Date &date){
54 double interest=acc.getSum(date)*rate;
55 if(interest!=0)record(date,interest,"interest");
56 if(date.getMonth()==1)
57 record(date,-fee,"annual fee");
58 acc.reset(date,getDebt());
59 }
60 void CreditAccount::show() const{
61 Account::show();
62 cout<<"\tAvailable credit: "<<getAvailableCredit();}
63
64
account.cpp
1 #include"account.h"
2 #include<iostream>
3 using namespace std;
4 int main(){
5 Date date(2008,11,1);
6 SavingAccount sa1(date,"S3755217",0.015);
7 SavingAccount sa2(date,"02342342",0.015);
8 CreditAccount ca(date,"c5392394",10000,0.0005,50);
9 Account*accounts[]={&sa1,&sa2,&ca};
10 const int n=sizeof(accounts)/sizeof(Account*);
11 cout<<"(d)deposit(w)withdraw(s)show(c)change day(n)next month (e)exit"<<endl;
12 char cmd;
13 do{
14 date.show();
15 cout<<"\tTotal: "<<Account::getTotal()<<"\tcommand>";
16 int index,day;
17 double amount;
18 string desc;
19 cin>>cmd;
20 swith(cmd){
21 case'd':
22 cin>>index>>amount;
23 getline(cin,desc);
24 accounts[index]->withdraw(date,amount,desc);
25 break;
26 case'w':
27 cin>>index>>amount;
28 getline(cin,desc);
29 accounts[index]->withdraw(date,amount,desc);
30 break;
31 case's':
32 for(int i=0;i<n;i++){
33 cout<<"["<<i<<"]";
34 accounts[i]->show();
35 cout<<endl;
36 }
37 break;
38 }
39 case'c':
40 cin>>day;
41 if(day<date.getDay())
42 cout<<"You cannot specify a previous day";
43
44 else if(day>date.getMaxDay())
45 cout<<"Invalid day";
46 else
47 date=Date(date.getYear(),date.getMonth(),day);
48 break;
49 case'n':
50 if(date.getMonth()==12)
51 date=Date(date.getYear()+1,1,1);
52 else
53 date=Date(date.getYear(),date.getMonth()+1,1);
54 for(int i=0;i<n;i++)
55 accounts[i]->settle(date);
56 break;}
57 }while(cmd!='e');
58 return 0;
59 }
8_8.cpp
任务3：
#pragma once
#include<iostream>
#include<string>
using namespace std;
class MachinePets{
public:
MachinePets(const string s):nickname(s){}
public:
virtual string talk()=0;
string get_nickname(){
return nickname;
}
private:
string nickname;
};
class PetCats: public MachinePets{
public:
PetCats(const string s):MachinePets(s){
}
string talk() override{
return "miao wu~";
}
};
class PetDogs:public MachinePets{
public:
PetDogs(const string s):MachinePets(s){
}
string talk() override{
return "wang wang ~";
}
};
pets.hpp
1 #include <iostream>
2 #include "pets.hpp"
3 void play(MachinePets &obj) {
4 std::cout << obj.get_nickname() << " says " << obj.talk() << std::endl;
5 }
6 void test() {
7 PetCats cat("miku");
8 PetDogs dog("da huang");
9 play( cat );
10 play( dog );
11 }
12 int main() {
13 test();
14 }
task3.cpp
任务4：
1 #pragma once
2 #include<string>
3 #include<iostream>
4
5
6 class Person{
7 private:
8 string name,telephone,email;
9 public:
10 Person();
11 Person(const string &a,const string &b,const string &c=" "):name(a),telephone(b),email(c){
12 }
13 Person(const Person& c):name(c.name),telephone(c.telephone),email(c.email){
14 }
15 void update_telephone(){
16 cout<<"请输入新的手机号码："<<endl;
17 cin>>telephone;
18 }
19 void update_email(){
20 cout<<"请输入新的邮箱地址："<<endl;
21 cin>>email;
22 }
23 friend std::ostream& operator<<(std::ostream& out,const Person& p){
24 out<<"name: "<<p.name<<"telephone: "<<p.telephone<<"email: "<<p.email<<endl;
25 return out;
26 }
27 //重载插入运算符<<为友元函数，支持使用诸如 cout << p << endl; 的方式输出联系人信息
28 friend std::istream& operator>>(std::istream& in, Person& p){
29 in>>p.name>>p.telephone>>p.email;
30 return in;
31 }
32 //重载提取运算符>>为友元函数，支持使用诸如 cin >> p 的方式输入联系人信息
33 friend bool operator==(const Person& p1,const Person &p2){
34 return p1.name==p2.name&&p1.telephone==p2.telephone&&p1.email==p2.email;
35 }
36 // 重载关系运算符==为友元函数，支持对两个联系人信息进行关系判断。
37 //只有当姓名和手机号都相同时，才返回true，否则，返回false。
38 };
Person.hpp
1 #include <iostream>
2 #include <vector>
3 #include "Person.hpp"
4
5 void test() {
6 using namespace std;
7
8 vector<Person> phone_book;
9 Person p;
10
11 cout << "输入一组联系人的联系方式，E直至按下Ctrl+Z终止\n";
12 while(cin >> p)
13 phone_book.push_back(p);
14
15 cout << "\n更新phone_book中索引为0的联系人的手机号、邮箱:\n";
16 phone_book.at(0).update_telephone();
17 phone_book.at(0).update_email();
18
19 cout << "\n测试两个联系人是否是同一个:\n";
20 cout << boolalpha << (phone_book.at(0) == phone_book.at(1)) << endl;
21 }
22
23 int main() {
24 test();
25 }
task4.cpp
标签：const,string,double,Date,实验,date,return
From： https://www.cnblogs.com/shaoshuai-nuist/p/17873435.html