CRect02
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//File:    crect02.cpp
//Date:    02/15/2002
//Authors: Us


////////////////////////////////////////////////////////////
//Problem: define CRectangle class and some data members, 
//         functions, and operators for it
////////////////////////////////////////////////////////////


////////////////////////////////////////////////////////////
// includes
////////////////////////////////////////////////////////////
#include <iostream.h>
#include <stdlib.h>
#include <time.h>


////////////////////////////////////////////////////////////
// constants
////////////////////////////////////////////////////////////
const int TEST_COUNT = 5;


////////////////////////////////////////////////////////////
// class TRectangle definition
////////////////////////////////////////////////////////////
class CRectangle
  {
  private:
    int m_length;
    int m_width;
  public:
    int getLength(void);
    int getWidth(void);
    CRectangle(void);
    CRectangle(const int length, const int width);
    void display(void);
  };


////////////////////////////////////////////////////////////
// prototype
////////////////////////////////////////////////////////////
void testConstructor1(void);
void testConstructor2(void);


////////////////////////////////////////////////////////////
// main
////////////////////////////////////////////////////////////
void main(void)
  {
  testConstructor1();
  testConstructor2();
  }


////////////////////////////////////////////////////////////
// CRectangle::display
////////////////////////////////////////////////////////////
// Description: 
//   displays the rectangle object
// Example:
//   if rect is an object with length=3 and width=4
//   then rect.display(); will output rect(3, 4)
////////////////////////////////////////////////////////////
void CRectangle::display(void)
  {
  cout << "rect(" << (*this).m_length;
  cout << ", " << this->m_width << ")\n";
  }


////////////////////////////////////////////////////////////
// CRectangle::getLength
////////////////////////////////////////////////////////////
// Description:
//   returns the length of the rectangle
// Example:
//   if rect is an object with length=3 and width=4
//   then a = rect.getLength(); will put 3 in a
////////////////////////////////////////////////////////////
int CRectangle::getLength(void)
  {
  return this->m_length;
  };


////////////////////////////////////////////////////////////
// CRectangle::getWidth
////////////////////////////////////////////////////////////
// Description:
//   returns the width of the rectangle
// Example:
//   if rect is an object with length=3 and width=4
//   then a = rect.getWidth(); will put 4 in a
////////////////////////////////////////////////////////////
int CRectangle::getWidth(void)
  {
  return this->m_width;
  };


////////////////////////////////////////////////////////////
// CRectangle::CRectangle
////////////////////////////////////////////////////////////
// Description:
//   constructs a rectangle object with given length and width
//   makes sure that the dimensions are not negative or zero
//   if a dimension is not valid it is set to default value 1
// Example:
//   if a=3 and b=4 then CRectangle rect(a, b); will create 
//   an object rect of type CRectangle with length=3 and width=4
////////////////////////////////////////////////////////////
CRectangle::CRectangle(const int a, const int b)
  {
  if (a < 0) 
      this->m_length = -a;
    else
      this->m_length = a;

  if (b < 0) 
      this->m_width = -b;
    else
      this->m_width = b;

  if (0 == a) 
      this->m_length = 1;

  if (0 == b) 
      this->m_width = 1;
  }


/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
// testConstructor2
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
// Description:
//   tests the constructor CRectangle(a, b) for CRectangle 
//   class by constructing a rectangle object with randomly
//   chosen values for length and width and displaying the 
//   rectangle object
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
void testConstructor2(void)
  {
  cout << "================\n";
  cout << "testConstructor2\n";
  cout << "================\n";

  for (int i=1; i<=TEST_COUNT; i++)
    {

    int a = -10 + rand()%21;
    int b = -10 + rand()%21;

    CRectangle r1(a, b);

    cout << "a= " << a << ", b= " << b << endl;

    cout << "After CRectangle r1(a, b);\n";
    cout << "Length = " << r1.getLength() << endl;
    cout << "Width  = " << r1.getWidth() << endl;
    
    r1.display();

    cout << "-----------------------\n";
    }
  }


////////////////////////////////////////////////////////////
// CRectangle::CRectangle
// Description:
//   constructs a rectangle object with default values for
//   its length and width
// Example:
//   CRectangle rect; will create an object
//   rect of type CRectangle with length=1 and width=1
////////////////////////////////////////////////////////////
CRectangle::CRectangle(void)
  {
  this->m_length=1;
  this->m_width=1;
  }


/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
// testConstructor1
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
// Description:
//   tests the constructor CRectangle for CRectangle 
//   class by constructing a rectangle object with default
//   values (1) for length and width and displaying the 
//   rectangle object
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
void testConstructor1(void)
  {
  cout << "================\n";
  cout << "testConstructor1\n";
  cout << "================\n";

  for (int i=1; i<=TEST_COUNT; i++)
    {
    CRectangle r1;

    cout << "After CRectangle r1;\n";
    cout << "Length = " << r1.getLength() << endl;
    cout << "Width  = " << r1.getWidth() << endl;
    
    r1.display();

    cout << "-----------------------\n";
    }
  }