task4.cpp
#include "Complex.hpp" #include <iostream> 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(); }
Complex.hpp
#pragma once #include<iostream> #include<cmath> using namespace std; class Complex { public: Complex(double r = 0.0, double i = 0.0); Complex(const Complex& C); double get_real() const; double get_imag() const; void show()const; void add(const Complex& c); friend Complex add(const Complex& c1, const Complex& c2); friend bool is_equal(const Complex& c1, const Complex& c2); friend double abs(const Complex& c); private: double real, 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 { if (real != 0)cout << real; if (imag > 0)cout << " + " << imag << "i" ; else if (imag < 0)cout << imag << "i" ; } void Complex::add(const Complex& c) { real += c.real; imag += c.imag; } Complex add(const Complex& c1, const Complex& c2) { Complex c; c.real = c1.real + c2.real; c.imag = c1.imag + c2.imag; return c; } bool is_equal(const Complex& c1, const Complex& c2) { if (c1.real == c2.real && c1.imag == c2.imag) return true; else return false; } double abs(const Complex& c) { return sqrt(c.real * c.real + c.imag * c.imag); }
task5.cpp
#include "User.hpp" #include <iostream> 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(); }
User.hpp
#pragma once using namespace std; #include<iostream> class User { public: User(string n0, string p = "111111", string e = "") :name(n0), passwd(p), email(e) { n++; } void set_email(); void change_passwd(); void print_info(); static void print_n() { cout << "there are " << n << " users."; } private: string name, passwd, email; static int n; }; void User::set_email() { cout << "Enter email address: "; cin >> email; cout << endl << "email is set successfully..." << endl; } void User::change_passwd() { string password; int i; cout << "Enter old password: "; cin >> password; for (i = 1; i <= 3; i++) { if (password == passwd) { cout << "Enter new password: "; cin >> passwd; cout << endl << "new password is set successfully..." << endl; break; } else cout << "password input error."; if (i < 3) { cout << "Please re-enter again: "; cin >> password; cout << endl; } else cout << "Please try after a while." << endl; } } void User::print_info() { int m = passwd.length(),i; cout << "name: " << name << endl; cout << "passwd: "; for (i = 1; i <= m; i++) cout << '*'; cout << endl; cout << "email: " << email; } int User::n = 0;
标签:real,const,cout,double,void,Complex,实验 From: https://www.cnblogs.com/fyh2021/p/16806077.html