第十章編程練習(6)

#pragma once
#ifndef ff_H_
#define ff_H_
class Move {
private:
	double x;
	double y;
public:
	Move(double a = 0,double b = 0);//初始化x,y
	void showmove()const;
	Move add(const Move & m);//把m對象的數據與調用對象的值相加，並返回這個對象
	void reset(double a = 0, double b = 0);//設置新的值給調用對象
	double rex()const;
	double rey()const;
};
#endif

#include "ff.h"
#include <iostream>
Move::Move(double a, double b)
{
	x = a;
	y = b;
}
void Move::showmove() const
{
	std::cout << "x = " << x
		<< "y = " << y << std::endl;

}
Move Move::add(const Move & m)
{
	double s,d;
	s = (*this).rex() + m.rex();
	d = (*this).rey() + m.rey();
	(*this).reset(s,d);
	return *this;
}
void Move::reset(double a, double b)
{
	x = a;
	y = b;
}
double Move::rex()const
{
	return x;
}
double Move::rey() const
{
	return y;
}

#include <iostream>
#include "ff.h"
#include <cstdlib>
using namespace std;
int main()
{
	Move mo;
	mo.reset(1.1, 1.2);
	cout << "mo :";
	mo.showmove();
	Move so;
	so.add(mo.add(so));
	cout << "so :";
	so.showmove();
	system("pause");
	return 0;
}