第八周實驗報告（1-2）

01.#include <iostream>  02.  03.using namespace std;  04.class Complex  05.{  06.public:  07.    Complex(){real=0;imag=0;}  08.    Complex(double r,double i){real=r;imag=i;}  09.    friend Complex operator+(Complex &c1,Complex &c2);  10.    friend Complex operator-(Complex &c1,Complex &c2);  11.    friend Complex operator*(Complex &c1,Complex &c2);  12.    friend Complex operator/(Complex &c1,Complex &c2);  13.    void display();  14.private:  15.    double real;  16.    double imag;  17.};  18.//下面定義成員函數  19.Complex operator+(Complex &c1,Complex &c2)  20.{  21.    return Complex (c1.real + c2.real,c1.imag + c2.imag);  22.}  23.Complex operator-(Complex &c1,Complex &c2)  24.{  25.    return Complex (c1.real - c2.real,c1.imag - c2.imag);  26.}  27.Complex operator*(Complex &c1,Complex &c2)  28.{  29.    Complex c;  30.  31.    c.real = c1.real * c2.real - c1.imag * c2.imag;  32.    c.imag = c1.real * c2.imag + c1.imag * c2.real;  33.      34.    return c;  35.}  36.Complex operator/(Complex &c1,Complex &c2)  37.{  38.    Complex c;  39.  40.    c.real = (c1.real * c2.real + c1.imag * c2.imag)/(c2.imag * c2.imag + c2.real * c2.real);  41.    c.imag = (c1.imag * c2.real - c1.real * c2.imag)/(c2.imag * c2.imag + c2.real * c2.real);  42.  43.    return c;  44.}  45.  46.void Complex::display()  47.{  48.    cout << "(" << real << "," << imag << "i)" << endl;  49.}  50.int main()  51.{  52.    Complex c1(3,4),c2(5,-10),c3;  53.    cout<<"c1 = ";  54.    c1.display();  55.    cout<<"c2 = ";  56.    c2.display();  57.    c3=c1+c2;  58.    cout<<"c1+c2 = ";  59.    c3.display();  60.    c3=c1-c2;  61.    cout<<"c1-c2 = ";  62.    c3.display();  63.    c3=c1*c2;  64.    cout<<"c1*c2 = ";  65.    c3.display();  66.    c3=c1/c2;  67.    cout<<"c1/c2 = ";  68.    c3.display();  69.    system("pause");  70.    return 0;  71.}