试验任务4
Complex.cpp
#pragma once
#include<iostream>
#include<cmath>
class Complex {
public:
Complex();
Complex(double newreal);
Complex(double newreal, double newimag);
Complex(const Complex& C);
double get_real() const;
double get_imag()const;
void show()const;
void add(const Complex &a);
friend Complex add(const Complex& a, const Complex& b);
friend bool is_equal(Complex& a, const Complex& b);
friend double abs(const Complex& a);
private:
double real;
double imag;
};
Complex::Complex() :real(0), imag(0) {}
Complex::Complex(double newreal) :real(newreal), imag(0) {}
Complex::Complex(double newreal, double newimag) :real(newreal), imag(newimag) {}
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 ;
if (imag != 0)
std::cout << "i";
}
void Complex::add(const Complex &a) {
real = real + a.real;
imag = imag + a.imag;
}
Complex add(const Complex& a, const Complex& b) {
Complex c;
c.real = a.real + b.real;
c.imag = a.imag + b.imag;
return c;
}
bool is_equal(Complex& a, const Complex& b) {
if (a.real == b.real && a.imag == b.imag)
return true;
else
return false;
}
double abs(const Complex&obj) {
return sqrt(obj.real * obj.real + obj.imag * obj.imag);
}
试验任务4 源码
#include <iostream>
#include "Complex.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();
}
运行结果
试验任务5User.hpp
#pragma once
#include<string>
#include<iostream>
using namespace std;
class User {
public:
User(string h,string p,string k) {
name = h;
passwd = p;
email = k;
n++;
};
User(string h) {
n++;
name = h;
passwd = "111111";
email ="";
}
void set_email();
void change_passwd() ;
void print_info();
static void print_n();
static int n;
private:
string name;
string passwd;
string email;
};
int User::n;
void User::print_info() {
cout << "name: " << name << endl;
cout << "passwd: " <<"******" << endl;
cout << "email: " << email << endl;
}
void User::change_passwd() {
string h;
int i;
cout << "Enter old passworld:";
for (i = 0; i < 3; i++)
{
cin >> h;
if (h == passwd)
{
cout << "Enter new passworld:";
cin >> passwd;
cout << "new passworld is set successfully..."<<endl;
break;
}
else {
if(i<=1)
cout << "passworld input error.please re-enter again:";
}
}
if (i == 3)
cout << "passworld input error.please try afer a while"<<endl;
}
void User::set_email() {
cout << "Enter email address:";
cin >> email;
cout << "email is set successfully..." << endl;
}
void User::print_n(){
cout << "There are " << n << " users"<<endl;
}
试验任务5 源码
#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();
}
实验总结
对于基本的语法使用还不太熟练
注意const static 的使用方法
标签：real,const,对象,double,imag,试验,Complex,void From： https://www.cnblogs.com/030227rzxx/p/16804647.html