第八周项目-1.2

#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 + (const Complex &c1,const Complex &c2);

friend Complex operator - (const Complex &c1, const Complex &c2);

friend Complex operator*(const Complex &c1, const Complex &c2);

friend Complex operator/(const Complex &c1, const Complex &c2);

void display();

private:

double real;

double imag;

};

//下面定义成员函数

Complex operator+(const Complex &c1, const Complex &c2)

{

return Complex(c1.real + c2.real, c1.imag + c2.imag);

}

Complex operator-(const Complex &c1, const Complex &c2)

{

return Complex(c1.real - c2.real, c1.imag - c2.imag);

}

Complex operator*(const Complex &c1, const Complex &c2)

{

return Complex(c1.real*c2.real - c1.imag*c2.imag, c1.real*c2.imag + c1.imag*c2.real);

}

Complex operator/(const Complex &c1, const Complex &c2)//(ac+bd)/(c^2+d^2)+〔(bc-ad)/(c^2+d^2)〕i

{

return Complex((c1.real*c2.real + c1.imag*c2.imag) / (c2.real*c2.real + c2.imag*c2.imag), (c1.imag*c2.real - c1.real*c2.imag) / (c2.real*c2.real + c2.imag*c2.imag));

}

void Complex::display()

{

if (imag == 0)

cout << real << endl;

else if (imag < 0)

cout << real << " - " << -imag << "i" << endl;

else

cout << real << " + " << imag << "i" << endl;

}

//下面定义用于测试的main()函数

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();

while (1){}

return 0;

}