601d.cpp

C++实训教程

//	601d.cpp	class C Overload operator+(const double d)
#include <iostream.h>
#include <math.h>
class C   //Complex
{
   private: float r,i;
   public:
	  C (float rr=0, float ii = 0){r = rr; i = ii;}
	  void Disp () 
	  {
	  		if(i<0) cout << r << i << "i\n";
	  		else   cout << r << "+" << i << "i\n";
	  }
	  C operator+ (C& obj)	  {	return C(r + obj.r, i + obj.i);  }
	  C operator+(const double d)  {	return C(r + d, i);  }
};
main(void)
{
	C c1 (10.0,10.0);
	C c3;
	c3 = c1 + 20;
	cout <<"c1 + 20 ->"; c3.Disp();
	return 0;
}
/*
c1 + 20 ->30+10i
*/