#ifndef COMPLEX_HPP #define COMPLEX_HPP #include <iostream> #include <string> #include <iomanip> #include <math.h> using namespace std; class Complex { public: Complex(){}; Complex(double a); Complex(double a, double b); Complex(const Complex &p); double get_real() const; double get_imag() const; void show() const; void add(const Complex &p); friend Complex add(const Complex &a, const Complex &b); friend bool is_equal(Complex a, Complex b); friend double abs(Complex a, Complex b); private: double real; double imag; }; Complex::Complex(double a) : real{a}, imag{0} { } Complex::Complex(double a, double b) : real{a}, imag{b} {} Complex::Complex(const Complex &p) : real{p.real}, imag{p.imag} {} double Complex::get_real() const { return real; } double Complex::get_imag() const { return imag; } void Complex::show() const { if (get_imag() < 0) { cout << real << " - " << 0 - imag << "i" << endl; } else { cout << real << " + " << imag << "i" << endl; } } void Complex::add(const Complex &p) { real = real + p.real; imag = imag + p.imag; } Complex add(const Complex &a, const Complex &b) { Complex c(a.get_real() + b.get_real(), a.get_imag() + b.get_imag()); return c; } bool is_equal(Complex a, Complex b) { if (a.real == b.real && a.imag == b.imag) return true; else return false; } double abs(const Complex &p) { return sqrt(p.get_real() * p.get_real() + p.get_imag() * p.get_imag()); } #endif
#include "Complex.hpp" #include <iostream> int main() { 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; }
#ifndef USER_HPP #define USER_HPP #include <iostream> #include <string> #include <string.h> #include <iomanip> #include <math.h> using namespace std; class User { public: User(); User(string a); User(string a, string b, string c); void set_email(); void change_passwd(); void print_info() const; static void print_n(); private: string name; string passwd; string email; static int count; }; int User::count = 0; User::User() { count++; } User::User(string a) : name{a}, passwd{"111111"}, email{"\0"} { count++; } User::User(string a, string b, string c) : name{a}, passwd{b}, email{c} { count++; } void User::set_email() { cout << "请输入邮箱: "; cin >> email; cout << "邮箱修改成功!" << endl; } void User::change_passwd() { cout << "请输入旧密码:"; string old_passwd; for (int i = 1; i <= 3; i++) { cin >> old_passwd; if (old_passwd == passwd) { cout << "请输入新密码:"; cin >> passwd; cout << "密码修改成功!" << endl; return; } else if (i < 3) { cout << "密码输入错误,请重试:"; } } cout << "密码输入错误次数过多,请稍后再试." << endl; } void User::print_info() const { cout << "用户名:" << name << endl; cout << "密码:******" << endl; cout << "邮箱:" << email << endl; } void User::print_n() { cout << "现在共有" << count << "位员工" << endl; } #endif
#include "User.hpp" #include <iostream> int main() { using namespace std; cout << "testing 1......" << endl; User user1("Jonny", "92197", "xyz@hotmail.com"); user1.print_info(); cout << endl << "testing 2......" << endl << endl; User user2("Leonard"); user2.change_passwd(); user2.set_email(); user2.print_info(); User::print_n(); }