OJ20

#include <iostream>

#include <iomanip>

using namespace std;

class Complex

{

public:

    Complex();

    Complex(double r,double i);

    Complex operator+(Complex &c2);

    Complex operator-(Complex &c2);

    Complex operator*(Complex &c2);

    Complex operator/(Complex &c2);

    void display();

private:

    double real;

    double imag;

};

Complex::Complex()
{
    real=0;
    imag=0;
}
Complex::Complex(double r,double i)
{

    real=r;
    imag=i;
}

Complex Complex ::operator+(Complex &c2)
{
    return Complex(real+c2.real,imag+c2.imag);

}
Complex Complex ::operator-(Complex &c2)
{
    return Complex(real-c2.real,imag-c2.imag);
}

    Complex Complex ::operator*(Complex &c2)
{
    return Complex((real*c2.real)-(imag*c2.imag),(imag*c2.real)+(real*c2.imag));

}
  Complex Complex ::operator/(Complex &c2)
{
     Complex  c;
    c.real=((c2.real*real+imag*c2.imag)/((c2.real*c2.real)+(c2.imag*c2.imag)));
    c.imag=((imag*c2.real-real*c2.imag)/((c2.real*c2.real)+(c2.imag*c2.imag)));
    return c;
}

void Complex ::display()
{
    cout<<"("<<real<<","<<imag<<"i)"<<endl;
}
//主函数已给定如下，提交时不需要包含，会自动添加到程序尾部

 

/* C++代码 */

 

int main()

{

    double real,imag;

    cin>>real>>imag;

    Complex c1(real,imag);

    cin>>real>>imag;

    Complex c2(real,imag);

    cout<<setiosflags(ios::fixed);

    cout<<setprecision(2);

    Complex c3=c1+c2;

    cout<<"c1+c2=";

    c3.display();

    c3=c1-c2;

    cout<<"c1-c2=";

    c3.display();

    c3=c1*c2;

    cout<<"c1*c2=";

    c3.display();

    c3=c1/c2;

    cout<<"c1/c2=";

    c3.display();

    return 0;

}