class Box { private: double lenght, width, height; public: Box(double l = 0.0, d

Question

class Box
{
private:
double lenght, width, height;
public:
Box(double l = 0.0, double w = 0.0, double h = 0.0)
{
lenght = l;
width = w;
height = h;
}

double GetLength() { return lenght; }
double GetWidth() { return width; }
double GetHeight() { return height; }
};

Overload the I/O operators for the above class to be able to achieve the calls in the main function below.

int main()
{
cout << "Enter a Box: " << endl;
Box objBox;
cin >> objBox;
cout << " You entered: " << objBox << endl;
return 0;
}

Please note that the output of your program should be as follows:

Explanation / Answer

//Header file
//Box.h
#ifndef BOX_H
#define BOX_H
#include<iostream>
using namespace std;
//Rational class defintion
class Box
{
private:
   double lenght, width, height;

public:

   //Default consturctor
   Box();

   //parameter construcotor
   Box(double l, double w , double h );

   double GetLength() ;
   double GetWidth() ;
   double GetHeight() ;

       //overload << and >> operators
   friend istream &operator>>( istream &input, Box &r );
   friend ostream &operator<<( ostream &output, Box &r );

};

#endif BOX_H

-------------------------------------------------------------------------------------------------------------------------------------

//Implementation file of Box.h header file
//Box.cpp
#include<iostream>
#include<iomanip>
//include Box.h header file
#include "Box.h"
using namespace std;
//Defautl constructor to set default values for lenght, width and height
Box::Box()
{
   lenght = 0.0;
   width = 0.0;
   height = 0.0;
}

//Parameter constructor that sets the lenght , widht and height values
Box::Box(double l , double w , double h )
{
   lenght = l;
   width = w;
   height = h;
}

//Returns lenght
double Box::GetLength()
{
   return lenght;
}

//Returns widht
double Box::GetWidth()
{
   return width;
}

//Returns height
double Box::GetHeight()
{
   return height;
}

//Overload insertion operator to read input box lenght , width and height
istream &operator>>( istream &input, Box &box )
{
   //to read a operator character
   //and then ignore ignore the operator  
   input>>box.lenght>>box.width>>box.height;  

   return input;
}
//Overload extraction operator to return the box object
ostream &operator<<( ostream &output, Box &box )
{  
  
   output<<"Box Length :"<<box.GetLength()<<
       " Width :"<<box.GetWidth()<<
       " Height :"<<box.GetHeight();

   //return the output object
   return output;
}

-----------------------------------------------------------------------------------------------------------------------------

/*C++ program that tests the Box class and read box object
and write to console*/
#include<iostream>
//include Box.h header file
#include "Box.h"
using namespace std;

int main()
{
   cout << "Enter a Box: " << endl;

   //Create an Box object
   Box objBox;

   //read box object values
   cin >> objBox;

   //print the Box object
   cout << " You entered: " << objBox << endl;

   system("pause");
   return 0;
}

--------------------------------------------------------------------------------------------------------------

Sample Output:

Enter a Box:
2 3 4

You entered:
Box Length :2 Width :3 Height :4

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