将运算符+和-重载为 complex 类的成员函数。 #include<iostream.h> class complex //复数类声明 { public: //外部接口 complex(double r=0.0,double i=0.0) //构造函数 {real=r;imag=i;} complex operator + (complex c2); //+重载为成员函数 complex operator - (complex c2); //-重载为成员函数 void display( ); //输出复数 private: //私有数据成员 double real; //复数实部 double imag; //复数虚部 }; 完成该类的实现并编译运行该程序。

以下是重载运算符+和-的 complex 类的实现代码：

#include<iostream>

class complex
{
public:
    complex(double r = 0.0, double i = 0.0)
    {
        real = r;
        imag = i;
    }

    complex operator+(complex c2)
    {
        return complex(real + c2.real, imag + c2.imag);
    }

    complex operator-(complex c2)
    {
        return complex(real - c2.real, imag - c2.imag);
    }

    void display()
    {
        std::cout << "(" << real << ", " << imag << "i)" << std::endl;
    }

private:
    double real;
    double imag;
};

int main()
{
    complex c1(1.0, 2.0);
    complex c2(3.0, 4.0);

    complex c3 = c1 + c2;
    c3.display();

    complex c4 = c1 - c2;
    c4.display();

    return 0;
}

运行结果：

(4, 6i)
(-2, -2i)