c4-7.cpp

C++面向对象设计教材例题程序4 C++面向对象设计教材例题程序4

#include <iostream>
using namespace std;
class Complex
 {public:
   Complex(){real=0;imag=0;}
   Complex(double r,double i){real=r;imag=i;}
   Complex operator + (Complex &c2);
   friend ostream& operator << (ostream&,Complex&);
  private:
   double real;
   double imag;
 };
Complex Complex::operator + (Complex &c2)
 {return Complex(real+c2.real,imag+c2.imag);}
   
ostream& operator << (ostream& output,Complex& c)
{output<<"("<<c.real<<"+"<<c.imag<<"i)"<<endl;
 return output;
}

int  main()
{Complex c1(2,4),c2(6,10),c3;
 c3=c1+c2;
 cout<<c3;
 return 0;
}