OJ 1.S

/*
定义一个复数类Complex，重载运算符“+”,“-”,“*”,“/”，使之能用于复数的加、减、乘、除。运算符重载函数作为Complex类的成员函数。编写程序，分别求两个复数之和、差、积和商。

Input
两个复数

Output
两个复数之和、差、积和商



*/
#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((c2.real*real-imag*c2.imag),(real*c2.imag+imag*c2.real));
}

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;
}
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;
}