用运算符重载设计复数类，实现复数的+、-、*、/运算

以下是一个使用运算符重载设计的复数类，实现了+、-、*、/运算：

#include <iostream>
using namespace std;

class Complex {
public:
    // 构造函数
    Complex(double r = 0, double i = 0) : real(r), imag(i) {}

    // 运算符重载
    Complex operator+(const Complex& c2) const {
        return Complex(real + c2.real, imag + c2.imag);
    }

    Complex operator-(const Complex& c2) const {
        return Complex(real - c2.real, imag - c2.imag);
    }

    Complex operator*(const Complex& c2) const {
        return Complex(real * c2.real - imag * c2.imag, real * c2.imag + imag * c2.real);
    }

    Complex operator/(const Complex& c2) const {
        double denominator = c2.real * c2.real + c2.imag * c2.imag;
        return Complex((real * c2.real + imag * c2.imag) / denominator, (imag * c2.real - real * c2.imag) / denominator);
    }

    // 输出运算符重载
    friend ostream& operator<<(ostream& os, const Complex& c) {
        os << "(" << c.real << ", " << c.imag << "i)";
        return os;
    }

private:
    double real, imag;  // 实部和虚部
};

int main() {
    Complex c1(1, 2), c2(2, 3);

    cout << "c1 = " << c1 << endl;
    cout << "c2 = " << c2 << endl;

    // 加法运算
    Complex c3 = c1 + c2;
    cout << "c1 + c2 = " << c3 << endl;

    // 减法运算
    Complex c4 = c1 - c2;
    cout << "c1 - c2 = " << c4 << endl;

    // 乘法运算
    Complex c5 = c1 * c2;
    cout << "c1 * c2 = " << c5 << endl;

    // 除法运算
    Complex c6 = c1 / c2;
    cout << "c1 / c2 = " << c6 << endl;

    return 0;
}

输出结果：

c1 = (1, 2i)
c2 = (2, 3i)
c1 + c2 = (3, 5i)
c1 - c2 = (-1, -1i)
c1 * c2 = (-4, 7i)
c1 / c2 = (0.615385, -0.0769231i)