Modify the C++ program below: .Change the setLength and setWidth (mutator) membe

Question

Modify the C++ program below:

.Change the setLength and setWidth (mutator) member functions to first check if the parameter < 0. If it is, assign the absolute value of the parameter (just negate). If it's 0, assign a default of 10. If it's >0, just assign the parameter.

·         Change the accessor functions (getLength and getWidth) so they're INLINE

·         Add a function to the class declaration that calculates and returns the perimeter of the Rectangle (NO PARAMETERS). Then write the function below the declaration (NOT AN INLINE FUNCTION).

Explanation / Answer

// This program creates three instances of the Rectangle class.
#include <iostream>
using namespace std;

// Rectangle class declaration.
class Rectangle
{
private:
double width;
double length;
public:
void setWidth(double);
void setLength(double);
double getWidth() const;
double getLength() const;
double getArea() const;
double peri()
{
   return 2*(length+width);
}  
};

//**************************************************
// setWidth assigns a value to the width member. *
//**************************************************

void Rectangle::setWidth(double w)
{
if(w<0)
   w=-(w);
else if(w==0)
   w=10;

width = w;
}

//**************************************************
// setLength assigns a value to the length member. *
//**************************************************

void Rectangle::setLength(double len)
{
if(len<0)
   len=-(len);
else if(len==0)
   len=10;

length = len;
}

//**************************************************
// getWidth returns the value in the width member. *
//**************************************************

INLINE double Rectangle::getWidth() const
{
return width;
}

//****************************************************
// getLength returns the value in the length member. *
//****************************************************

INLINE double Rectangle::getLength() const
{
return length;
}

//*****************************************************
// getArea returns the product of width times length. *
//*****************************************************

double Rectangle::getArea() const
{
return width * length;
}

//*****************************************************
// Function main *
//*****************************************************

int main()
{
double number; // To hold a number
double totalArea; // The total area
Rectangle kitchen; // To hold kitchen dimensions
Rectangle bedroom; // To hold bedroom dimensions
Rectangle den; // To hold den dimensions

// Get the kitchen dimensions.
cout << "What is the kitchen's length? ";
cin >> number; // Get the length
kitchen.setLength(number); // Store in kitchen object
cout << "What is the kitchen's width? ";
cin >> number; // Get the width
kitchen.setWidth(number); // Store in kitchen object

// Get the bedroom dimensions.
cout << "What is the bedroom's length? ";
cin >> number; // Get the length
bedroom.setLength(number); // Store in bedroom object
cout << "What is the bedroom's width? ";
cin >> number; // Get the width
bedroom.setWidth(number); // Store in bedroom object

// Get the den dimensions.
cout << "What is the den's length? ";
cin >> number; // Get the length
den.setLength(number); // Store in den object
cout << "What is the den's width? ";
cin >> number; // Get the width
den.setWidth(number); // Store in den object

// Calculate the total area of the three rooms.
totalArea = kitchen.getArea() + bedroom.getArea()
+ den.getArea();

// Display the total area of the three rooms.
cout << "The total area of the three rooms is "
<< totalArea << endl;

// Display the Perimeter of Rectangle.
cout << "The Perimeter of rectangle is "
<< den.peri << endl;

return 0;
}

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