dog.cpp.txt

C++上机课的习题答案

// Chapter 10 of C++ How to Program
// Debugging Problem (dog.cpp)

#include <iostream>

using std::cout;
using std::endl;
using std::cin;
using std::string;

#include "animal.h"
#include "dog.h"

// default constructor
Dog::Dog( int h, int w, string n )
   : Animal( h, w )
{
   setName( n );
   metricHeight = h * 2.5;
   metricWeight = w / 2.2;

} // end class Dog constructor

// return name
string Dog::getName() const 
{
   return name;

} // end function getName

// function setName definition
void Dog::setName( string n ) 
{
   name = n;

} // end function setName

// function print definition
void Dog::print() const
{
   cout << "This animal is a dog, its name is: "
        << name << endl;
   //Animal::print();

} // end function print

// return height
int Dog::getHeight() const
{
   if ( useMetric( "height" ) )
      return metricHeight;

   else
      return Animal::getHeight();

} // end function print

// return weight
int Dog::getWeight() const
{
   if ( useMetric( "weight" ) )
      return metricWeight;

   else
      return Animal::getWeight();

} // end function getWeight
// function useMetric definition
bool Dog::useMetric( string type ) const
{
   int choice = 0;

   cout << "Which units would you like to see the "
        << type << " in? (Enter 1 or 2)\n"
        << "\t1. metric\n"
        << "\t2. standard\n";

   cin >> choice;

   if ( choice == 1 )
      return true;

   else
      return false;

} // end function useMetric