プロジェクト2(メンバー関数、友元関数と一般関数の違い)
1816 ワード
/*
*
* Copyright (c)2013,
* All rightsreserved.
* :CPoint .cpp
* :
* :2013 4 15
* : v1.0
* :
* :
* :
* :
#include<iostream>
#include<Cmath>
using namespace std;
class CPoint
{
private:
double x;
double y;
public:
CPoint(double xx=0,double yy=0):x(xx),y(yy){}
double distance1(CPoint &);//
friend double distance2(CPoint &,CPoint &);//
double getX(){return x;}
double getY(){return y;}
};
double distance3(CPoint &,CPoint &);//
double CPoint::distance1(CPoint &p)// ,distance1 CPoint::
{
double dx=(x-p.x),dy=y-p.y;
return sqrt(dx*dx+dy*dy);
}
double distance2(CPoint &p1,CPoint &p2)// ,distance2 CPoint::,
{
double dx=(p1.x-p2.x),dy=p1.y-p2.y;
return sqrt(dx*dx+dy*dy);
}
double distance3(CPoint &p1,CPoint &p2)//
{
double dx=(p1.getX()-p2.getX()), dy=p1.getY()-p2.getY();
return sqrt(dx*dx+dy*dy);
}
int main()
{
CPoint p1(10,13),p2(-5,6);
cout<<"1. :"<<p1.distance1(p2)<<endl;
cout<<"2. :"<<distance2(p1,p2)<<endl;
cout<<"3. :"<<distance3(p1,p2)<<endl;
system("pause");
return 0;
}
*実行結果: