第九周任务（一）

#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);

friend Complex operator+(Complex &c1,double d);

friend Complex operator+(double d,Complex &c1);

friend Complex operator-(Complex &c1,double d);

friend Complex operator-(double d,Complex &c1);

friend Complex operator*(Complex &c1,double d);

friend Complex operator*(double d,Complex &c1);

friend Complex operator/(Complex &c1,double d);

friend Complex operator/(double d,Complex &c1);

Complex operator-();

void display();

friend ostream & operator <<(ostream &,Complex &);

friend istream & operator >>(istream &,Complex &);
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;
}

Complex operator+(Complex &c1,double d)
{
return Complex(c1.real+d,c1.imag);
}

Complex operator+(double d,Complex &c1)
{
return Complex(c1.real+d,c1.imag);
}

Complex operator-(Complex &c1,double d)
{
return Complex(c1.real-d,c1.imag);
}

Complex operator-(double d,Complex &c1)
{
return Complex(c1.real-d,c1.imag);
}

Complex operator*(Complex &c1,double d)
{
return Complex(c1.real*d,c1.imag*d);
}

Complex operator*(double d,Complex &c1)
{
return Complex(c1.real*d,c1.imag*d);
}

Complex operator/(Complex &c1,double d)
{
return Complex(c1.real/d,c1.imag/d);
}

Complex operator/(double d,Complex &c1)
{
return Complex(c1.real/d,c1.imag/d);
}

Complex Complex:: operator-()
{
return Complex(-real,-imag);
}

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

ostream & operator <<(ostream & output,Complex &c)
{
output<<"("<<c.real;
if(c.imag>=0)output<<"+";
output<<c.imag<<"i)"<<endl;
return output;
}

istream & operator >>(istream & input,Complex &c)
{
cout<<"请输入虚数"<<endl;
input>>c.real>>c.imag;

return input;
}

int main()
{
Complex c1,c2,c3;
double d=3;
cin>>c1;
cout<<"c1="<<c1<<endl;

cin>>c2;
cout<<"c2="<<c2<<endl;

c3=c1+c2;
cout<<"c1+c2="<<c3<<endl;

c3=c1-c2;
cout<<"c1-c2="<<c3<<endl;

c3=c1*c2;
cout<<"c1*c2="<<c3<<endl;

c3=c1/c2;
cout<<"c1/c2="<<c3<<endl;

c3=c1+d;
cout<<"c1+d="<<c3<<endl;

c3=d+c1;
cout<<"d+c1="<<c3<<endl;

c3=c1-d;
cout<<"c1-d="<<c3<<endl;

c3=d-c1;
cout<<"d-c1="<<c3<<endl;

c3=c1*d;
cout<<"c1*d="<<c3<<endl;

c3=d*c1;
cout<<"d*c1="<<c3<<endl;

c3=c1/d;
cout<<"c1/d="<<c3<<endl;

c3=d/c1;
cout<<"d/c1="<<c3<<endl;

c3=-c1;
cout<<"-c1="<<c3<<endl;

c3=-c2;
cout<<"-c2="<<c3<<endl;

system("pause");
return 0;
}