1 #pragma once 2 #include<iostream> 3 #include<cmath> 4 using namespace std; 5 class Complex 6 { 7 friend Complex add(Complex c1, Complex c2); 8 friend bool is_equal(Complex c1, Complex c2); 9 friend double abs(Complex c); 10 public: 11 Complex(); 12 Complex (double i); 13 Complex (double i, double j); 14 Complex (const Complex &p); 15 double get_real(); 16 double get_imag(); 17 void show(); 18 void add(Complex &p); 19 private: 20 double real; 21 double imag; 22 }; 23 Complex::Complex() :real{ 0 }, imag{ 0 } 24 { 25 } 26 Complex::Complex(double i) :real{i}, imag{ 0 } 27 { 28 } 29 Complex::Complex(double i,double j) :real{ i }, imag{ j } 30 { 31 } 32 Complex::Complex(const Complex &p) :real{ p.real }, imag{ p.imag } 33 { 34 } 35 double Complex::get_real() 36 { 37 return real; 38 } 39 double Complex::get_imag() 40 { 41 return imag; 42 } 43 void Complex::show() 44 { 45 if (imag == 0) 46 { 47 cout << real; 48 } 49 else if (imag < 0) 50 { 51 cout << real << "-" << fabs(imag)<<"i"; 52 } 53 else 54 { 55 cout << real << "+" << imag<<"i"; 56 } 57 } 58 void Complex::add(Complex &p) 59 { 60 real = real + p.real; 61 imag = imag + p.imag; 62 } 63 Complex add(Complex c1, Complex c2) 64 { 65 Complex c3; 66 c3.real = c1.real + c2.real; 67 c3.imag = c1.imag + c2.imag; 68 return c3; 69 } 70 bool is_equal(Complex c1, Complex c2) 71 { 72 if (c1.real == c2.real && c1.imag == c2.imag) 73 return true; 74 else 75 return false; 76 } 77 double abs(Complex c) 78 { 79 return sqrt((c.real * c.real) + (c.imag * c.imag)); 80 }
#include "Complex.h" #include <iostream> // 类测试 void test() { using namespace std; Complex c1(6, -6); Complex c2(2.9); 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();
}
#pragma once #include<iostream> #include<string> using namespace std; class User { public: User(string _name); User(string _name, string _password, string _email); void set_email(); void change_password(); void print_info(); static void print_count(); private: string name; string password; string email; static int count; }; int User::count = 0; User::User(string _name) :name{ _name }, password{ "111111" }, email{ "" } { count++; } User::User(string _name, string _password, string _email) :name{ _name }, password{ _password }, email{ _email } { count++; } void User::set_email() { cout << "请设置邮箱地址:"; string s; cin >> s; email = s; cout << "邮箱设置成功!" << endl; } void User::change_password() { string s1, s2; int k = 3; cout << "请输入原密码:"; cin >> s1; while (k!=1) { if (s1 == password) { cout << "请输入新密码:"; cin >> s2; password = s2; cout << "密码设置成功!" << endl; break; } else { cout << "密码错误,请重新输入:"; cin >> s1; k--; } } if (k == 1) cout << "密码错误,请稍后再试!" << endl; } void User::print_info() { int n; n = password.length(); cout << "name:" << name << endl; cout << "password:"; for (int i = 1; i <= n; i++) { cout << "*"; } cout << endl; cout << "email:" << email << endl; } void User::print_count() { cout << "总共有" << User::count << "个用户。" << endl; }
#include "user.h" #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_password(); cout << endl; user2.set_email(); cout << endl; user2.print_info(); cout << endl; User::print_count(); } int main() { test(); }
标签:string,double,void,Complex,实验,User,imag From: https://www.cnblogs.com/220011wan/p/16785577.html