第八周任务一（2）

#include <iostream>using namespace std;class Complex{public:Complex(){real=0;imag=0;}Complex(double r,double i){real=r;imag=i;}friend Complex operator+(Complex &c1,Complex &c2);friend Complex operator-(Complex &c1,Complex &c2);friend Complex operator*(Complex &c1,Complex &c2);friend Complex operator/(Complex &c1,Complex &c2);void display();private:double real;double imag;};//下面定义成员函数Complex operator+(Complex &c1,Complex &c2){return Complex (c1.real + c2.real,c1.imag + c2.imag);}Complex operator-(Complex &c1,Complex &c2){return Complex (c1.real - c2.real,c1.imag - c2.imag);}Complex operator*(Complex &c1,Complex &c2){Complex c;c.real = c1.real * c2.real - c1.imag * c2.imag;c.imag = c1.real * c2.imag + c1.imag * c2.real;return c;}Complex operator/(Complex &c1,Complex &c2){Complex c;c.real = (c1.real * c2.real + c1.imag * c2.imag)/(c2.imag * c2.imag + c2.real * c2.real);    c.imag = (c1.imag * c2.real - c1.real * c2.imag)/(c2.imag * c2.imag + c2.real * c2.real);return c;}void Complex::display(){cout << "(" << real << "," << imag << "i)" << endl;}int main(){Complex c1(3,4),c2(5,-10),c3;cout<<"c1 = ";c1.display();cout<<"c2 = ";c2.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();c3=c1/c2;cout<<"c1/c2 = ";c3.display();system("pause");return 0;}