C++程序习题-运算符重载[4.6]

    请编写程序，处理一个复数与一个double数相加的运算，结果保存在一个double型变量d1中，输出d1的值，再以复数形式输出此值。定义Complex（复数）类，在成员函数中包含重载类型转换运算符：

operator double() {return real;}

#include <iostream>
using namespace std;

//复数类

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

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



int main()
{
    Complex c1(3,4),c2(5,-10),c3;
    double d = c1 + 3.3;
    c3 = d;
    cout << "c1=";c1.display();
    cout << "c2=";c2.display();
    cout << "c1 + 3.3=" << d << endl;
    cout << "c3 = " ; c3.display();
    system("pause");
    return 0;
}