定义一个复数类complex，重载运算符“+”"-""×""÷"，使之能用于复数的加法运算

好的，定义一个复数类complex，可以包含两个成员变量：实部real和虚部imaginary。同时，可以定义构造函数、析构函数以及重载运算符“+”、“-”、“*”和“/”来实现复数的加减乘除运算。具体实现如下：

class complex {
public:
    complex(double r = 0, double i = 0): real(r), imaginary(i) {} // 构造函数
    ~complex() {} // 析构函数
    
    // 重载运算符
    complex operator+(const complex& c) const {
        return complex(real + c.real, imaginary + c.imaginary);
    }
    
    complex operator-(const complex& c) const {
        return complex(real - c.real, imaginary - c.imaginary);
    }
    
    complex operator*(const complex& c) const {
        double r = real * c.real - imaginary * c.imaginary;
        double i = real * c.imaginary + imaginary * c.real;
        return complex(r, i);
    }
    
    complex operator/(const complex& c) const {
        double denominator = c.real * c.real + c.imaginary * c.imaginary;
        double r = (real * c.real + imaginary * c.imaginary) / denominator;
        double i = (imaginary * c.real - real * c.imaginary) / denominator;
        return complex(r, i);
    }
    
private:
    double real; // 实部
    double imaginary; // 虚部
};

当我们定义了这个类之后，就可以直接使用“+”、“-”、“*”和“/”运算符进行复数的加减乘除运算了。例如：

complex a(1, 2);
complex b(3, 4);

complex c = a + b; // 复数相加
complex d = a - b; // 复数相减
complex e = a * b; // 复数相乘
complex f = a / b; // 复数相除