运行并修改以下代码#include<iostream> using namespace std; class Complex { private: double real; double imag; public: Complex(){real = 0;imag = 0;} Complex(double r,double im){real = r; imag = im;} friend Complex operator +(Complex &a, Complex &b); friend Complex operator -(Complex &a, Complex &b); friend Complex operator *(Complex &a, Complex &b); friend Complex operator /(Complex &a, Complex &b); friend ostream & operator <<(ostream &os, Complex &a); friend istream & operator >>(istream &in, Complex &a); Complex operator ++(int); Complex operator --(int); Complex& operator ++(); Complex& operator --(); void display() const; }; Complex operator +(Complex &a,Complex &b) { return Complex(a.real+b.real,a.imag+b.imag); } Complex operator -(Complex &a,Complex &b) { return Complex(a.real-b.real,a.imag-b.imag); } Complex operator *(Complex &a,Complex &b) { return Complex(a.real*b.real-a.imag*b.imag,a.real*b.imag+a.imag*b.real); } Complex operator /(Complex &a,Complex &b) { return Complex((a.real*b.real+a.imag*b.imag)/(b.real*b.real+b.imag*b.imag) , (a.imag*b.real-a.real*b.imag)/(b.real*b.real+b.imag*b.imag)); } ostream & operator <<(ostream &os, Complex &a) { os << "(" << a.real << "," << a.imag << "i)" <<endl; return os; } istream & operator >>(istream &in, Complex &a) { in >> a.real >> a.imag; return in; } Complex Complex::operator ++(int) { Complex temp(*this); temp.real++; temp.imag++; return temp; } Complex Complex::operator --(int) { Complex temp(*this); temp.real--; temp.imag--; return temp; } Complex& Complex::operator ++() { this ->real++; this ->imag++; return *this; } Complex& Complex::operator --() { this ->real--; this ->imag--; return *this; } void Complex::display() const { cout << " ( " << real << " , " << imag << "i )" << endl; } int main(void) { Complex a(3,4), b(5,6); Complex c1, c2, c3, c4,c5; cout << "a " << a << "b " << b; c1 = a + b; cout << "a + b = "; c1.display(); c2 = a - b; cout << "a - b = "; c2.display(); c3 = a * b; cout << "a * b = "; c3.display(); c4 = a / b; cout << "a / b = "; c4.display(); cout << "++c1 = "; ++c1; cout << c1; cout << "--c1 = "; --c1; cout <<c1; cout << "c1++ = "; c2++; cout << c2; cout << "c1-- = "; c2--; cout << c2; cout << "请输入一个复数： "; cin >> c5; cout << c5; }

这段代码定义了一个名为 Complex 的复数类，可以进行加、减、乘、除、前缀/后缀自增自减和输入输出操作。在 main() 函数中，创建了两个 Complex 类型的对象 a 和 b，然后进行了加减乘除等运算，并输出运算结果。最后还进行了输入操作，并输出输入的结果。

你可以运行这段代码，测试它的功能，并且尝试对它进行一些修改，比如增加一些操作符的重载，或者修改输出格式等等。

相关问题

请重载复数类的流插入和流提取运算符，实现复数类的输出和输入。 #include<iostream> #include <string> using namespace std; //--------------------- class Complex { private: double real,imag; public: Complex(){ real=imag=0; } Complex(double r){ real=r;imag=0; } Complex(double r,double i){ real=r;imag=i; } // 在此处补充你的代码 int main() { Complex c; cin>>c; cout<<c; }

在此处给出复数类的流插入和流提取运算符的实现：

#include<iostream>
#include <string>

using namespace std;

class Complex {
private:
    double real,imag;
public:
    Complex() {
        real = imag = 0;
    }
    Complex(double r) {
        real = r;
        imag = 0;
    }
    Complex(double r, double i) {
        real = r;
        imag = i;
    }

    friend istream& operator>>(istream& is, Complex& c) {
        is >> c.real >> c.imag;
        return is;
    }

    friend ostream& operator<<(ostream& os, const Complex& c) {
        os << "(" << c.real << ", " << c.imag << "i)";
        return os;
    }
};

int main() {
    Complex c;
    cin >> c;
    cout << c;
    return 0;
}

在以上代码中，我们使用了 `friend` 关键字来声明流插入和流提取运算符的友元关系，这样就可以直接访问 `Complex` 类的私有成员变量。在流插入运算符中，我们输出复数的实部和虚部；在流提取运算符中，我们从输入流中读取两个浮点数，分别为复数的实部和虚部。

设计一个复数类并实现复数的三种运算。#include <iostream> using namespace std; /********* Begin *********/ class Complex

复数是由实数和虚数构成的数，其中虚数是以$i$表示的数，$i^2 = -1$。因此，复数由实部和虚部两个实数组成。

设计一个复数类需要包含以下内容：
1. 实部和虚部两个私有成员变量
2. 构造函数，用于初始化实部和虚部
3. 重载运算符，包括加减乘三种运算

下面是一个复数类的实现，包括加减乘三种运算：

class Complex {
private:
    double real;  // 实部
    double imag;  // 虚部
public:
    Complex(double r = 0, double i = 0) : real(r), imag(i) {}
    Complex operator+(const Complex &c) const {
        return Complex(real + c.real, imag + c.imag);
    }
    Complex operator-(const Complex &c) const {
        return Complex(real - c.real, imag - c.imag);
    }
    Complex operator*(const Complex &c) const {
        return Complex(real * c.real - imag * c.imag, real * c.imag + imag * c.real);
    }
};

其中，`operator+`、`operator-`、`operator*` 分别实现了复数的加减乘运算。使用时，可以直接使用 `+`、`-`、`*` 运算符进行复数的加减乘操作。