Question

C++

// Rectangle.cpp is the Rectangle class function implementation file.
#include "Rectangle.h"

/*******************************************************************
 *                    Rectangle::setLength                         *
 * If the argument passed to the setLength function is zero or     *
 * greater, it is copied into the member variable length, and true *
 * is returned. If the argument is negative, the value of length   *
 * remains unchanged and false is returned.                        *
 *******************************************************************/
bool Rectangle::setLength(double len)
{
        bool validData = true;

   if (len >= 0)               // If the len is valid
      length = len;            // copy it to length
   else
      validData = false;       // else leave length unchanged
   
   return validData;
}

/******************************************************************
 *                    Rectangle::setWidth                         *
 * If the argument passed to the setWidth function is zero or     *
 * greater, it is copied into the member variable width, and true *
 * is returned. If the argument is negative, the value of width   *
 * remains unchanged and false is returned.                       *
 ******************************************************************/
bool Rectangle::setWidth(double w)
{
        bool validData = true;

   if (w >= 0)                 // If w is valid
      width = w;               // copy it to width
   else
      validData = false;       // else leave width unchanged
   
   return validData;
}

/**************************************************************
 *                     Rectangle::getLength                   *
 * This function returns the value in member variable length. *
 **************************************************************/
double Rectangle::getLength()
{
        return length;
}

/**************************************************************
 *                     Rectangle::getWidth                    *
 * This function returns the value in member variable width.  *
 **************************************************************/
double Rectangle::getWidth()
{
        return width;
}

/*******************************************************************
 *                        Rectangle::getArea                       *
 * This function calculates and returns the area of the rectangle. *
 *******************************************************************/
double Rectangle::getArea()
{
        return length * width;
}

Answer 1

Note: Could you plz go through this code and let me know if u need any changes in this.Thank You
=================================

// Rectangle.h

#ifndef RECTANGLE_H
#define RECTANGLE_H

class Rectangle
{
public:
Rectangle();
bool setLength(double len);
bool setWidth(double w);
double getLength();
double getWidth();
double getArea();
private:
// Declaring variables
double length;
double width;
};
#endif

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

// Rectangle.cpp

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

Rectangle::Rectangle()
{
this->length=0;
this->width=0;

}
/*******************************************************************
* Rectangle::setLength *
* If the argument passed to the setLength function is zero or *
* greater, it is copied into the member variable length, and true *
* is returned. If the argument is negative, the value of length *
* remains unchanged and false is returned. *
*******************************************************************/
bool Rectangle::setLength(double len)
{
bool validData = true;

if (len >= 0) // If the len is valid
length = len; // copy it to length
else
validData = false; // else leave length unchanged

return validData;
}

/******************************************************************
* Rectangle::setWidth *
* If the argument passed to the setWidth function is zero or *
* greater, it is copied into the member variable width, and true *
* is returned. If the argument is negative, the value of width *
* remains unchanged and false is returned. *
******************************************************************/
bool Rectangle::setWidth(double w)
{
bool validData = true;

if (w >= 0) // If w is valid
width = w; // copy it to width
else
validData = false; // else leave width unchanged

return validData;
}

/**************************************************************
* Rectangle::getLength *
* This function returns the value in member variable length. *
**************************************************************/
double Rectangle::getLength()
{
return length;
}

/**************************************************************
* Rectangle::getWidth *
* This function returns the value in member variable width. *
**************************************************************/
double Rectangle::getWidth()
{
return width;
}

/*******************************************************************
* Rectangle::getArea *
* This function calculates and returns the area of the rectangle. *
*******************************************************************/
double Rectangle::getArea()
{
return length * width;
}

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

// main.cpp

#include <iostream>
using namespace std;
#include "Rectangle.h"
int main()
{
double length,width;
Rectangle r;
while(true)
{
cout<<"Enter Length :";
cin>>length;
if(!r.setLength(length))
{
cout<<"** Invalid.Must be >=0 **"<<endl;
}
else
{
break;
}
}
  
while(true)
{
cout<<"Enter Width :";
cin>>width;
if(!r.setWidth(width))
{
cout<<"** Invalid.Must be >=0 **"<<endl;
}
else
{
break;
}
}
  
cout<<"Length "<<r.getLength()<<endl;
cout<<"Width "<<r.getWidth()<<endl;
cout<<"Area of Rectangle :"<<r.getArea()<<endl;
  
return 0;
}

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

Output:

=====================Could you plz rate me well.Thank You