601a.cpp

C++实训教程

/*
	601a.cpp
	class C Overload using
*/
#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)
	{
		C t;
		t.r +=obj.r;
		t.i +=obj.i;
		return t;
	}
	C operator- (C& obj)
	{	r -=obj.r;		i -=obj.i;		return *this;	}
};

main(void)
{
	C c1 (10.0,10.0);
	C c2 (-20.0,-20.0);
	C c3;
	cout <<"c1 = "; c1.Disp();
	c3 = c1 + c2;
	cout <<"c1 = "; c1.Disp();
	cout <<"c1 + c2 ->"; c3.Disp();
	c3 = c1 - c2;
	cout <<"c1 - c2 ->"; c3.Disp();
	cout <<"c1 = "; c1.Disp();
	return 0;
}
/*
c1 = 10+10i
c1 = 10+10i
c1 + c2 ->-20-20i
c1 - c2 ->30+30i
c1 = 30+30i
*/