Question

In C++

***//Cat.h//***

#ifndef __Cat_h__
#define __Cat_h__
#include <string>
using namespace std;

struct Cat
{
double length;
double height;
double tailLength;
string eyeColour;
string furClassification; //long, medium, short, none
string furColours[5];
};

void initCat (Cat&, double, double, double, string, string, const string[]);
void readCat (Cat&);
void printCat (const Cat&);
bool isCalico (const Cat&);
bool isTaller (const Cat&, const Cat&);

#endif

***//Cat.cpp//***

#include "Cat.h"
#include <iostream>
using namespace std;

void initCat (Cat& cat, double l, double h, double tL, string eC, string fCl, const string furCol[])
{
int i = 0;
cat.length = l;
cat.height = h;
cat.tailLength = tL;
cat.eyeColour = eC;
cat.furClassification = fCl; //long, medium, short, none
while (furCol[i] != "")
{
cat.furColours[i] = furCol[i];
i++;
}
cat.furColours[i] = "";

}

void readCat (Cat& cat)
{
int i = 0;
cout << "Please decribe the cat" << endl;
cout << "Please enter a length: ";
cin >> cat.length;
cout << "Please enter a height: ";
cin >> cat.height;
cout << "Please enter a tail length: ";
cin >> cat.tailLength;
cout << "Please enter an eye colour: ";
cin >> cat.eyeColour;
cout << "Please enter a description of the fur (long, medium, short, none): ";
cin >> cat.furClassification;
cout << "Please enter the colours of the fur (separated by a space or a newline character). ";
cout << "Add \"done\" at the end: ";
cin >> cat.furColours[i];
while (cat.furColours[i] != "done")
{
i++;
cin >> cat.furColours[i];
}
cat.furColours[i] = "";
}

void printCat (const Cat& cat)
{
int i = 0;
cout << "Length: "<< cat.length << " Height: "<< cat.height
<< " Tail Length: " << cat.tailLength << endl;
cout << "Eye Colour: " << cat.eyeColour
<< " Fur Classification: " << cat.furClassification << endl;
cout << "Cat Colours: ";
while (cat.furColours[i] != "")
{
cout << cat.furColours[i++] << " ";
}
cout << endl;
}

bool isCalico (const Cat& cat)
{
if (cat.furColours[3] != "")
return false;
for (int i=0; i< 3; i++)
{
if (cat.furColours[i] != "black" &&
cat.furColours[i] != "orange" &&
cat.furColours[i] != "white")
return false;
}
return true;
}

bool isTaller (const Cat& cat1, const Cat& cat2)
{
return (cat1.height > cat2.height);
}

***// main.cpp //***

#include "Cat.h"
#include <iostream>
using namespace std;

int main()
{
Cat averageCat, myCat;

string colours[5];
colours[0] = "brown";
colours[1] = "";
initCat (averageCat, 46, 24, 30, "green", "medium", colours);

readCat (myCat);

cout << "The average cat has height " << averageCat.height << endl;

cout << "-------------------------------------------------------"<< endl;
cout << "This is myCat:" << endl;
printCat (myCat);
if (isTaller (myCat, averageCat))
{
cout << "My cat is taller than the average cat\n";
}
else
{
cout << "My cat is shorter than the average cat\n";
}
if (isCalico (myCat))
{
cout << "My cat is a calico\n";
}

return 0;
}

1) Modify all of the functions so that they are member functions. Use the scope resolution operator (::) to show that an implementation of a function is part of a class

2) Change the initialization function into a constructor with arguments.

3) Add a default constructor that initializes things to 0 or empty string.

4) Add one getter to return the height.

5) Modify the calls in main to reflect the change in the functions.

6) Be sure to add the keyword const after functions that do not change the data.

Answer 1

Here is the code for Cat.h:

//***//Cat.h//***

#ifndef __Cat_h__
#define __Cat_h__
#include <iostream>
#include <cstring>
using namespace std;
class Cat
{
double length;
double height;
double tailLength;
string eyeColour;
string furClassification; //long, medium, short, none
string furColours[5];
public:
   Cat();
   Cat(double, double, double, string, string, const string[]);
   void readCat();
   void printCat();
   bool isCalico();
   bool isTaller(const Cat&);
   double getHeight();
};
#endif

Here is the code for Cat.cpp:

//***//Cat.cpp//***
#include "Cat.h"
#include <iostream>
using namespace std;

Cat::Cat()
{
length = 0;
height = 0;
tailLength = 0;
eyeColour = "";
furClassification = "none"; //long, medium, short, none
for(int i = 0; i < 5; i++)
{
furColours[i] = "";
}
}
Cat::Cat (double l, double h, double tL, string eC, string fCl, const string furCol[])
{
int i = 0;
length = l;
height = h;
tailLength = tL;
eyeColour = eC;
furClassification = fCl; //long, medium, short, none
while (furCol[i] != "")
{
furColours[i] = furCol[i];
i++;
}
furColours[i] = "";
}
void Cat::readCat ()
{
int i = 0;
cout << "Please decribe the cat" << endl;
cout << "Please enter a length: ";
cin >> length;
cout << "Please enter a height: ";
cin >> height;
cout << "Please enter a tail length: ";
cin >> tailLength;
cout << "Please enter an eye colour: ";
cin >> eyeColour;
cout << "Please enter a description of the fur (long, medium, short, none): ";
cin >> furClassification;
cout << "Please enter the colours of the fur (separated by a space or a newline character). ";
cout << "Add \"done\" at the end: ";
cin >> furColours[i];
while (furColours[i] != "done")
{
i++;
cin >> furColours[i];
}
furColours[i] = "";
}
void Cat::printCat ()
{
int i = 0;
cout << "Length: "<< length << " Height: "<< height
<< " Tail Length: " << tailLength << endl;
cout << "Eye Colour: " << eyeColour
<< " Fur Classification: " << furClassification << endl;
cout << "Cat Colours: ";
while (furColours[i] != "")
{
cout << furColours[i++] << " ";
}
cout << endl;
}
bool Cat::isCalico ()
{
if (furColours[3] != "")
return false;
for (int i=0; i< 3; i++)
{
if (furColours[i] != "black" &&
furColours[i] != "orange" &&
furColours[i] != "white")
return false;
}
return true;
}
bool Cat::isTaller (const Cat& cat2)
{
return (height > cat2.height);
}

double Cat::getHeight()
{
   return height;
}

And the code for CatDemo.cpp is:

//***// main.cpp //***
#include "Cat.cpp"
//#include <iostream>
using namespace std;
int main()
{
Cat myCat;
string colours[5];
colours[0] = "brown";
colours[1] = "";
Cat averageCat (46, 24, 30, "green", "medium", colours);
myCat.readCat();
cout << "The average cat has height " << averageCat.getHeight() << endl;
cout << "-------------------------------------------------------"<< endl;
cout << "This is myCat:" << endl;
myCat.printCat();
if (myCat.isTaller(averageCat))
{
cout << "My cat is taller than the average cat\n";
}
else
{
cout << "My cat is shorter than the average cat\n";
}
if (myCat.isCalico())
{
cout << "My cat is a calico\n";
}
return 0;
}

And the output screenshot is: