Write a class called Box that has three double fields called height, width and l

ID: 3860535 • Letter: W

Question

Write a class called Box that has three double fields called height, width and length. The class should have set methods for each field. It should have a three-parameter constructor that takes three doubles and passes them to the set methods to initialize the fields of the Box. It should have a default constructor that uses the set methods to initialize each field to 1. It should have a method that calculates and returns the volume of the Box and a method that calculates and returns the surface area of the Box.

The class declaration (interface) and the function definitions (implementation) must be in separate files - the interface or "header" file has a .hpp extension and the implementation has a .cpp extension. As usual, all data members should be private. The Box class might be used as follows:

Your functions should have the following names:

setHeight

setWidth

setLength

calcVolume

calcSurfaceArea

Explanation / Answer

Box.hpp

#ifndef BOX_HPP
#define BOX_HPP
using namespace std;
class Box{
   double height, width,length;
   public:
   Box();
   Box(double,double,double);
   void setHeight(double);
   void setWidth(double);
   void setLength(double);
   double getVolume();
   double getSurfaceArea();
};
#endif

Box.cpp

#include<iostream>
#include "Box.hpp"
using namespace std;
void Box::setLength( double len )
{
length = len;
}

void Box::setWidth( double wid )
{
width= wid;
}

void Box::setHeight( double hei )
{
height = hei;
}
Box::Box()
{
   setLength(1);
   setWidth(1);
   setHeight(1);
}
Box::Box(double len,double wid,double hei)
{
   setLength(len);
   setWidth(wid);
   setHeight(hei);
}
double Box::getVolume()
{
   return length*height*width;
}
double Box:: getSurfaceArea()
{
   return (2*length*width)+(2*length*height)+(2*width*height);
}

main.cpp

#include<iostream>
#include "Box.hpp"
using namespace std;
int main()
{
   Box B;
   cout<<"Volume: "<<B.getVolume();
   cout<<" Surface area: "<<B.getSurfaceArea();
   Box B1(3,4,1);
   cout<<" Volume: "<<B1.getVolume();
   cout<<" Surface area: "<<B1.getSurfaceArea();
   return 0;
}

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Write a class called Box that has three double fields called height, width and l

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