OJ—— 复数类--重载运算符2+

#include <iostream>

#include <iomanip>

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+(int &i);

friend Complex operator+(int&,Complex &);

void display();

private:

double real;

double imag;

};
Complex Complex::operator+(Complex &c2)
{
Complex c;
c.real=real+c2.real;
c.imag=imag+c2.imag;
return c;
}
Complex Complex::operator+(int &i)
{
return  Complex(real+i,imag);
}
Complex operator+(int&i,Complex &c2)
{
return Complex(c2.real+i,c2.imag);
}
void Complex::display()
{
cout<<"("<<real<<","<<imag<<"i)"<<endl;
}
int main()

{

double real,imag;

cin>>real>>imag;

Complex c1(real,imag);

cin>>real>>imag;

Complex c2(real,imag);

cout<<setiosflags(ios::fixed);

cout<<setprecision(2);

Complex c3=c1+c2;

cout<<"c1+c2=";

c3.display();

int i;

cin>>real>>imag;

cin>>i;

c3=Complex(real,imag)+i;

cout<<"c1+i=";

c3.display();

cin>>i;

cin>>real>>imag;

c1=Complex(real,imag);

c3=i+c1;

cout<<"i+c1=";

c3.display();

return 0;

}