#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;
}