oj（一）v

//请编写程序，处理一个复数与一个double数相加的运算，
//结果存放在一个double型的变量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>
#include <iomanip>
using namespace std;
class Complex
{
public:
    Complex();
    Complex(double r);
    Complex(double r,double i);
    operator double();
    void display();
private:
    double real;
    double imag;
};
//***********
Complex::Complex(){}
Complex::Complex(double r)
{
    real=r;
    imag=0;
}
Complex::Complex(double r,double i)
{
    real=r;
    imag=i;
}
 Complex::operator double()
 { return real; }
 void Complex::display()
 {
     cout<<"("<<real<<", "<<imag<<")"<<endl;
 }
//**************
int main()
{
    cout<<setiosflags(ios::fixed);
    cout<<setprecision(2);
    double real,imag;
    cin>>real>>imag;
    Complex c1(real,imag);
    double d1;
    cin>>d1;
    d1=d1+c1;
    cout<<"d1="<<d1<<endl;
    Complex c2=Complex(d1);
    cout<<"c2=";
    c2.display();
    return 0;
}

结果：