复数类--重载运算符3+

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Problem E: C++习题复数类--重载运算符3+

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Description

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; }

Input

一个复数与一个double数

Output

d1的值和复数形式的此值

Sample Input

3 42.5

Sample Output

d1=5.50

c2=(5.50, 0.00)

HINT

#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(){real=0,real=0;}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;}

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