3- In the program figurespointers we have a base class location and va.pdf

3. In the program figurespointers we have a base class location and various derived classes:
circle, triangle, rectangle. Complete the implementation of the derived classes.
For marking purposes, run the program entering: circle(1,2,3), triangle(3,4,1,2,1) and
rectangle(5,6,3,4). Explain why this program does not work properly.
Change the classes (not main) so that the program runs properly and run the program with the
same data as before.
Declaration of Classes FigurePointers
This is the copy paste code for this code:
Declaration of Classes Figure Pointers:
/* File: figurepointers.h
*/
#ifndef FIGUREPOINTERS_H
#define FIGUREPOINTERS_H
#include <cmath>
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
class location {
private :
float x; // position of the figure
float y;
public :
void read(istream & in ) ;

void write(ostream & out ) const ;
virtual float area( void ) const ;
};
class circle : public location {
private :
float radius;
public :
void read(istream & in );
float area( void ) const ; // area of the figure;
};
class rectangle : public location {
private :
float side1, side2;
public :
};
class triangle : public rectangle {
private :
float angle;
public :

};
#endif /* FIGUREPOINTERS_H */
Implementation of Class FigurePointers:
/* File: figurepointers.cpp
Implementation of class figurepointers */
#include "figurepointers.h"
////////////////// implementation of location /////// ///////////
void location::read(istream & in)
{
cout <<"x coordinate: ";
in >> x;
cout <<"y coordinate: ";
in >> y;
}
float location::area( void ) const
{
return 0.0;
}
void location::write(ostream & out) const
{

out << "x coordinate: " << x << endl;
out << "y coordinate: " << y << endl;
out << "area = " << area() << endl;
}
////////////////// implementation of circle //////////////////
////////////////// implementation of triangle //////////////////
////////////////// implementation of rectangle //////////////////
Main Program Using Classes FigurePointers:
/* File: testfigurepointers.cpp
Application program using classes figurepointers
Programmer: your name Date: */
#include "figurepointers.h"
int main( void )
{
string type; // figure type
ofstream fout ("testfigurepointersout.txt");
location * p;
while ( true ) { // loop until break occurs
cout << endl << "Type of figure: "; cin >> type;
if (type == "circle") {
p = new circle;
p->read(cin);
fout << endl << "object is a circle" << endl;

p->write(fout);
delete p;
} else if (type == "triangle") {
p = new triangle;
p->read(cin);
fout << endl << "object is a triangle" << endl;
p->write(fout);
delete p;
} else if (type == "rectangle") {
p = new rectangle;
p->read(cin);
fout << endl << "object is a rectangle" << endl;
p->write(fout);
} else break ; // we are done entering data
}
fout.close();
return 0;
}
Declaration of Classes FigurePointers #endif /* FIGUREPOINTERSH */ Implementation of
Classes FigurePointers /* File: figurepointers. cpp Implementation of class figurepointers */
#include "figurepointers.h" void location:: read (istream & in) { cout < "x coordinate: "; in x ;
cout << " y coordinate: "; in y ; } float location:: area (void) const f return 0.0 ; } void location::
write (ostream & out) const { out "x coordinate: " < x x < endl ; out << "y coordinate: " < y <<
endl; out "area = " area () < endl } Main Program Using Classes FigurePointers

3- In the program figurespointers we have a base class location and va.pdf

3- In the program figurespointers we have a base class location and va.pdf

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3- In the program figurespointers we have a base class location and va.pdf