实验任务4
Complex.hpp
1 #pragma once 2 #include<iostream> 3 #include<cmath> 4 5 using namespace std; 6 7 class Complex { 8 public: 9 10 Complex(double real2, double imag2); 11 Complex(const Complex &obj); 12 13 public: 14 double get_real() const{ return real; } 15 double get_imag() const { return imag; } 16 void show() const { 17 if (imag == 0) { 18 cout << real; 19 } 20 else if (imag > 0) { 21 cout << real << " + " << imag << "i"; 22 } 23 else 24 cout << real << " - " << abs(imag) << "i"; 25 ;} 26 void add(const Complex &obj); 27 28 friend bool is_equal(const Complex &obj1,const Complex &obj2); 29 friend double abs(const Complex &obj); 30 friend Complex add(const Complex &obj1, const Complex &obj2); 31 32 private: 33 double real, imag; 34 }; 35 36 37 Complex::Complex(double real=0.0,double imag=0.0):real{real},imag{imag}{} 38 Complex::Complex(const Complex& obj) { 39 real = obj.real; 40 imag = obj.imag; 41 } 42 void Complex::add(const Complex &obj){ 43 real += obj.real; 44 imag += obj.imag; 45 } 46 bool is_equal(const Complex& obj1, const Complex& obj2){ 47 if (obj1.real == obj2.real && obj1.imag == obj2.imag) { 48 return true; 49 } 50 else 51 return false; 52 } 53 double abs(const Complex& obj) { 54 return sqrt( obj.real * obj.real + obj.imag * obj.imag); 55 } 56 Complex add(const Complex &obj1,const Complex &obj2) { 57 return Complex(obj1.real + obj2.real, obj1.imag + obj2.imag); 58 }
task4.cpp
1 #include "Complex.hpp" 2 #include <iostream> 3 4 // 类测试 5 void test() { 6 using namespace std; 7 8 Complex c1(3, -4); 9 const Complex c2(4.5); 10 Complex c3(c1); 11 12 cout << "c1 = "; 13 c1.show(); 14 cout << endl; 15 16 cout << "c2 = "; 17 c2.show(); 18 cout << endl; 19 cout << "c2.imag = " << c2.get_imag() << endl; 20 21 cout << "c3 = "; 22 c3.show(); 23 cout << endl; 24 25 cout << "abs(c1) = "; 26 cout << abs(c1) << endl; 27 28 cout << boolalpha; 29 cout << "c1 == c3 : " << is_equal(c1, c3) << endl; 30 cout << "c1 == c2 : " << is_equal(c1, c2) << endl; 31 32 Complex c4; 33 c4 = add(c1, c2); 34 cout << "c4 = c1 + c2 = "; 35 c4.show(); 36 cout << endl; 37 38 c1.add(c2); 39 cout << "c1 += c2, " << "c1 = "; 40 c1.show(); 41 cout << endl; 42 } 43 44 int main() { 45 test(); 46 }
测试截图:
实验任务5
User.hpp
1 #pragma once 2 #include<iostream> 3 #include<string> 4 5 using namespace std; 6 using std::to_string; 7 8 class User { 9 public: 10 User(string name0, string passwd0 = "111111", string email0 = "") :name{name0}, passwd{passwd0}, email{email0} { count++; } 11 void set_email() ; 12 void change_passwd() ; 13 void print_info() ; 14 static void print_n() { cout << "there are " << count << " users" << endl; } 15 16 public: 17 static int count; 18 19 private: 20 string name; 21 string passwd; 22 string email; 23 }; 24 int User::count = 0; 25 26 void User::set_email() { 27 string email1; 28 cout << "Enter email address: "; 29 cin >> email1; 30 email = email1; 31 cout << "email is set successfully..." << endl; 32 } 33 void User::change_passwd() { 34 string passwd1, passwd2; 35 cout << "enter old password: "; 36 cin >> passwd1; 37 if (passwd1.compare(passwd) == 0) { 38 cout << "enter new passwd: "; 39 cin >> passwd2; 40 passwd = passwd2; 41 cout << "new passwd is set successfully..." << endl; 42 } 43 else{ 44 cout << "password input error.please re-enter again:"; 45 cin >> passwd1; 46 if (passwd1.compare(passwd)==0) { 47 cout << "enter new passwd: "; 48 cin >> passwd2; 49 passwd = passwd2; 50 cout << "new passwd is set successfully..." << endl; 51 } 52 else { 53 cout << "password input error.please re-enter again:"; 54 cin >> passwd1; 55 if (passwd1.compare(passwd) == 0) { 56 cout << "enter new passwd: "; 57 cin >> passwd2; 58 passwd = passwd2; 59 cout << "new passwd is set successfully..." << endl; 60 } 61 else { 62 cout << "password input error."; 63 cout << "please try after a while." << endl; 64 65 } 66 } 67 } 68 } 69 void User::print_info() { 70 cout << "name: " << name << endl; 71 cout << "passwd: "; 72 string s1(passwd.length(), '*'); 73 cout << s1 << endl; 74 cout << "email: " << email << endl; 75 }
task5.cpp
1 #include "User.hpp" 2 #include <iostream> 3 4 // 测试User类 5 void test() { 6 using std::cout; 7 using std::endl; 8 9 cout << "testing 1......\n"; 10 User user1("Jonny", "92197", "xyz@hotmail.com"); 11 user1.print_info(); 12 13 cout << endl 14 << "testing 2......\n\n"; 15 16 User user2("Leonard"); 17 user2.change_passwd(); 18 user2.set_email(); 19 user2.print_info(); 20 21 cout << endl; 22 User::print_n(); 23 } 24 25 int main() { 26 test(); 27 }
实验截图: