请设计复数类Complex，实现复数的算术、赋值运算符的重载。 输入三行，每行是一个复数的实部和虚部。 输出两行，分别是c1+c2+c3，c1*c2*c3的值。 C++

++代码如下：

#include<iostream>
using namespace std;

class Complex{
public:
    Complex(double real_=0.0,double imag_=0.0):real(real_),imag(imag_){}
    Complex operator+(const Complex& a)const{
        return Complex(real+a.real,imag+a.imag);
    }
    Complex operator-(const Complex& a)const{
        return Complex(real-a.real,imag-a.imag);
    }
    Complex operator*(const Complex& a)const{
        return Complex(real*a.real-imag*a.imag,real*a.imag+imag*a.real);
    }
    Complex operator/(const Complex& a)const{
        double denominator=a.real*a.real+a.imag*a.imag;
        return Complex((real*a.real+imag*a.imag)/denominator,(imag*a.real-real*a.imag)/denominator);
    }
    Complex operator+=(const Complex& a){
        real+=a.real;
        imag+=a.imag;
        return *this;
    }
    Complex operator-=(const Complex& a){
        real-=a.real;
        imag-=a.imag;
        return *this;
    }
    Complex operator*=(const Complex& a){
        double temp_real=real*a.real-imag*a.imag;
        imag=real*a.imag+imag*a.real;
        real=temp_real;
        return *this;
    }
    Complex operator/=(const Complex& a){
        double denominator=a.real*a.real+a.imag*a.imag;
        double temp_real=(real*a.real+imag*a.imag)/denominator,
        temp_imag=(imag*a.real-real*a.imag)/denominator;
        real=temp_real;
        imag=temp_imag;
        return *this;
    }
    Complex operator=(const Complex& a){
        real=a.real;
        imag=a.imag;
        return *this;
    }
    friend ostream& operator<<(ostream& os,const Complex& n){
        os<<n.real<<'+'<<n.imag<<"i";
        return os;
    }
    friend istream& operator>>(istream& is,Complex& n){
        is>>n.real>>n.imag;
        return is;
    }
private:
    double real,imag;
};
int main(){
    Complex c1,c2,c3;
    cin>>c1>>c2>>c3;
    Complex ans=c1*c2*c3;
    cout<<c1<<endl<<c2<<endl<<c3<<endl<<ans<<endl;
    return 0;
}