3.
c.hpp
#include <iostream> #include <cmath> class Complex { public: Complex(double r = 0, double i = 0); Complex(const Complex& c); double get_real() const; double get_imag() const; void show() const; void add(const Complex& c1); private: double real, imag; public: friend Complex add(const Complex& c1, const Complex& c2) { return (c1.get_real() + c2.get_real(), c1.get_real() + c2.get_real()); } friend bool is_equal(const Complex& c1, const Complex& c2) { if (c1.real == c2.real && c1.imag == c2.imag) return 1; else return 0; } friend double abs(const Complex& c1) { return sqrt(c1.real * c1.real + c1.imag * c1.imag); } }; Complex::Complex(double r , double i ) { real = r; imag = i; } Complex::Complex(const Complex& c) { real = c.real; imag = c.imag; } double Complex::get_real() const { return real; } double Complex::get_imag() const { return imag; } void Complex::show()const { std::cout << real << "+" << (imag) << "i"; } void Complex::add(const Complex& c1) { real = real + (c1.real); imag = imag + (c1.imag); }
#include"c.hpp" void test() { using namespace std; Complex c1(3, -4); const Complex c2(4.5); Complex c3(c1); cout << "c1 = "; c1.show(); cout << endl; cout << "c2 = "; c2.show(); cout << endl; cout << "c2.imag = " << c2.get_imag() << endl; cout << "c3 = "; c3.show(); cout << endl; cout << "abs(c1) = "; cout << abs(c1) << endl; cout << boolalpha; cout << "c1 == c3 : " << is_equal(c1, c3) << endl; cout << "c1 == c2 : " << is_equal(c1, c2) << endl; Complex c4; c4 = add(c1, c2); cout << "c4 = c1 + c2 = "; c4.show(); cout << endl; c1.add(c2); cout << "c1 += c2, " << "c1 = "; c1.show(); cout << endl; } int main() { test(); system("pause"); }
![](/i/l/?n=23&i=blog/3300059/202310/3300059-20231022224912344-59300024.png)
4.User.hpp
#pragma once #include<iostream> #include<string> #include<iomanip> using namespace std; class User {public: User(string name = "Mary", string passwd = "111111", string email = "NULL"); string set_email(); void change_passwd(); void print_info(); void static print_n(); private: string name, passwd, email; private: static int count; }; int User::count = 0; User::User(string n , string p , string e ) { name = n; passwd = p; email = e; count++; } string User::set_email(){ return email; } void User::change_passwd() { cout << "Enter Old password" << endl; int i = 0;string s3; std::cin >> s3; for (i = 0;i <=2;i++) { if ( s3!= passwd) { cout << "password input error.Please re-enter again" << endl; } else if (i == 2) { cout << "password input error.Please try after a while" << endl; } i++; } } void User::print_info() { string s1 = User::passwd; string s2(s1.size(), '*'); cout << name << "`" << s2 << "`" << email << endl; } void User::print_n() { cout << "there are"<<count <<"users" << endl; }
User.cpp
#include "User.hpp" #include <iostream> // 测试User类 void test() { using std::cout; using std::endl; cout << "testing 1......\n"; User user1("Jonny", "92197", "[email protected]"); user1.print_info(); cout << endl << "testing 2......\n\n"; User user2("Leonard"); user2.change_passwd(); user2.set_email(); user2.print_info(); cout << endl; User::print_n(); } int main() { test();}
5.account.h
#ifndef ACCOUNT_H
#include "account.h" #include <cmath> #include <iostream> using namespace std; double SavingsAccount::total = 0; //SavingsAccount类相关成员函数的实现 SavingsAccount::SavingsAccount(int date, int id, double rate):id(id), balance(0), rate(rate), lastDate(date), accumulation(0){ cout << date << "\t#" << id << "is created" << endl; } void SavingsAccount::record(int date, double amount){ accumulation = accumulate(date); lastDate = date; amount = floor(amount * 100 + 0.5) / 100; //保留小数点后两位 balance += amount; total += amount; cout << date << "\t#" << id << "\t" << amount << "\t" << balance <<endl; } void SavingsAccount::deposit(int date, double amount) { record(date, amount); } void SavingsAccount::withdraw(int date, double amount){ if (amount > getBlance()) cout << "Error: not enough money" << endl; else record(date, -amount); } void SavingsAccount::settle(int date){ double interest = accumulate(date) * rate/365; //计算年息 if (interest != 0) record(date, interest); accumulation = 0; } void SavingsAccount::show() const { cout << "#" << id << "\tBlance:" << balance; }
#define ACCOUNT_H class SavingsAccount { private: int id; //账号 double balance; //余额 double rate; //存款的年利率 int lastDate; //上次变更余额的时期 double accumulation; //余额按日累加之和 static double total; //所有账户的总金额 //记录一笔账,date为日期,amount为金额,desc为说明 void record(int date, double amount); //获得到指定日期为止的存款金额按日积累值 double accumulate(int date) const{ return accumulation+balance*(date - lastDate); } public: //构造函数 SavingsAccount(int date, int id, double rate); int getId() const {return id;} double getBlance() const {return balance;} double getRate() const {return rate;} static double getTotal() {return total;} void deposit(int date, double amount); //存入现金 void withdraw(int date, double amount); //取出现金 //结算利息,每年1月1日调用一次该函数 void settle(int date); //显示账户信息 void show() const; }; #endif //_ _ACCOUNT_H_ _
account.cpp
#include "account.h" #include <cmath> #include <iostream> using namespace std; double SavingsAccount::total = 0; //SavingsAccount类相关成员函数的实现 SavingsAccount::SavingsAccount(int date, int id, double rate):id(id), balance(0), rate(rate), lastDate(date), accumulation(0){ cout << date << "\t#" << id << "is created" << endl; } void SavingsAccount::record(int date, double amount){ accumulation = accumulate(date); lastDate = date; amount = floor(amount * 100 + 0.5) / 100; //保留小数点后两位 balance += amount; total += amount; cout << date << "\t#" << id << "\t" << amount << "\t" << balance <<endl; } void SavingsAccount::deposit(int date, double amount) { record(date, amount);} void SavingsAccount::withdraw(int date, double amount){ if (amount > getBlance()) cout << "Error: not enough money" << endl; else record(date, -amount); } void SavingsAccount::settle(int date){ double interest = accumulate(date) * rate/365; //计算年息 if (interest != 0) record(date, interest); accumulation = 0; } void SavingsAccount::show() const { cout << "#" << id << "\tBlance:" << balance; }
cpp
#include "account.h" #include <iostream> using namespace std; int main(){ //建立几个账户 SavingsAccount sa0(1, 21325302, 0.015); SavingsAccount sa1(1, 58320212, 0.015); //几笔账目 sa0.deposit(5, 5000); sa1.deposit(25, 10000); sa0.deposit(45, 5500); sa1.withdraw(60, 4000); //开户后第90天到了银行的计息日,结算所有账户的年息 sa0.settle(90); sa1.settle(90); //输出各个账户信息 sa0.show(); cout << endl; sa1.show(); cout << endl; cout << "Total: " << SavingsAccount::getTotal() << endl; return 0; }
标签:real,const,int,double,Complex,实验,include From: https://www.cnblogs.com/32re/p/17781361.html