C++课后题——（C++重载运运算符）定义一个复数类Complex，重载运算符“+”、“-”，“*”，“/”使之能用与复数的加减乘除。运算符重载函数作为Complex类的成员函数。

定义一个复数类Complex，重载运算符“+”、“-”，“*”，“/”使之能用与复数的加、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。

#include<iostream>
using namespace std;

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

	Complex operator+(Complex &c2);
	Complex operator-(Complex &c2);
	Complex operator*(Complex &c2);
	Complex operator/(Complex &c2);
	void display();
private:
	double real;
	double imag;
};

void Complex::display(){
	cout<<"("<<real<<","<<imag<<"i"<<")"<<endl;
}

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

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

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

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

int main(){
	Complex c1(3,4),c2(5,-10),c3;

	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;
}