C++运算符重载方法详解

返回类型 operator符号(参数列表) {
    // 实现逻辑
}

class Complex {
public:
    double real, imag;
    Complex(double r = 0, double i = 0) : real(r), imag(i) {}
// 成员函数方式重载 +
Complex operator+(const Complex& other) const {
    return Complex(real + other.real, imag + other.imag);
}
};

class Complex {
    double real, imag;
public:
    Complex(double r = 0, double i = 0) : real(r), imag(i) {}
friend std::ostream& operator<<(std::ostream& out, const Complex& c);
};
std::ostream& operator<<(std::ostream& out, const Complex& c) {
out << c.real << " + " << c.imag << "i";
return out;
}

Complex& operator=(const Complex& other) {
    if (this != &other) {
        real = other.real;
        imag = other.imag;
    }
    return *this;
}

bool operator==(const Complex& other) const {
    return real == other.real && imag == other.imag;
}

int& operator[](int index) {
    return data[index];  // 假设 data 是内部数组
}