[YTU]_2440 (C++习题 复数类--重载运算符+,-,*,/)

#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()
{}
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)
{return Complex((real*c2.real+imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag),(imag*c2.real-real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag));}
void Complex::display()
{
	cout<<'('<<real<<','<<imag<<"i)"<<endl;
}
int main()
{
	double real,imag;
	cin>>real>>imag;
	Complex c1(real,imag);
	cin>>real>>imag;
	Complex c2(real,imag);
	cout<<setiosflags(ios::fixed)<<setprecision(2);
	Complex c3=c1+c2;
	cout<<"c+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;
}