11.8复习题 1

#ifndef STONEWT_H

#define STONEWT_H

class Stone

{

private:

enum {div = 14};

int stone;

double point;

double pounds;

public :

Stone();

Stone(int s,double pt);

Stone(double pds);

~Stone();

Stone operator * (double pds);

void show();

};

#endif

=======================================================

#include "stonewt.h"

#include <iostream>

using namespace std;

Stone::Stone()

{}

Stone::Stone(int s,double pt)

{

stone = s;

point = pt;

pounds = s*div+pt;

}

Stone::Stone(double pds){

stone = (int)pds / div;

point = (int)pds % div + pds - (int)pds;

pounds = pds;

}

 Stone::~Stone()  {}

 Stone Stone::operator * (double pds)

 {

 Stone s;

    /*int sstone = (int)pds / div;

double spoint = (int)pds % div + pds - (int)pds;

//double spounds = pds;*/

  s.point = int (point * pds) % div + pds - (int)pds;

  s.stone = stone * (int)pds + int(point * pds) / div;

  return s;

 }

 void Stone::show()

 {

 cout << "The result is: " << stone << " stone " << point << " pounds" << endl;

 }

       

============================================================

#include "stonewt.h"

int main()

{

Stone st(5,3),st1;

st1 = st * 6.5;

st1.show();

return 0;

}