For this assignment, you will write a new version of the area calculation progra

Question

For this assignment, you will write a new version of the area calculation program from Unit 3 that makes use of inheritance in C++. Add a new Shape base class to the area calculation program that includes data members common to all shapes (such as a shape ID, a shape type, and a unit of measure). You will use the Code::Blocks software to write this application.

Assignment Instructions

Part 1: Write the Application

Write a new version of the area calculation program from Unit 3 that makes use of inheritance in C++.

Add a new Shape base class to the area calculation program that includes data members common to all shapes (such as a shape ID, a shape type, and a unit of measure).

The Shape base class should also include a virtual getArea() member function.

Revise the Circle and Square classes so that they inherit from the Shape base class.

Add a third shape to the program that also inherits from the Shape class.

The finished program should ask the user to enter the relevant information for each shape and then print the area and other information for each shape.

My code from the previous assignment is below:

CODE :

circle.h :

#ifndef CIRCLE_H
#define CIRCLE_H

struct Circle { // circle structure class

public:   Circle();   // declaration
void setRadius(double r);   // setting the radius
double getRadius();   // getting the radius
double Area();   // get the area calculated
void Display(); // display the datda

protected:   double Radius; // radius value declared

private:

};

#endif

square.h :

#ifndef SQUARE_H
#define SQUARE_H

struct Square { // square structure class

public : Square(); // declaration
void setLength(double l); // setting the length
double getLength(); // getting the length
double Area(); // get the area calculated
void Display(); // display the data

protected : double Length; // length value declaration

private:
};

#endif

circle.cpp :

#include <iostream>
#include "circle.h"

using namespace std;

const double PI = 3.14159; // initialisng the global values
Circle::Circle() {   // method declaration

Radius = 0; // initialisng the radius value

}

void Circle::setRadius(double r) {  

Radius = r <= 0 ? 1 : r; // checking the input value

}

double Circle::getRadius() {  

return Radius; //getting and setting the value

}

double Circle::Area(){  
return Radius * Radius * PI; // returning the area
}

void Circle::Display(){   // display the data

cout << " Circle Properties";  
cout << " Radius = " << getRadius();  
cout << " Area = " << Area() << " ";
}

square.cpp :

#include <iostream>
#include "square.h"

using namespace std;

Square::Square(){ // method declaration

Length = 0; // length initialisng

}

void Square::setLength(double l) {

Length = l <= 0 ? 1 : l; // checking the data

}

double Square::getLength() {  

return Length; // returning the length

}

double Square::Area() {  

return Length*4; // returning the area

}
void Square::Display(){   // display the data

cout << " Square Properties";  
cout << " Length = " << getLength();  
cout << " Area = " << Area() << " ";
}

main.cpp :

#include "circle.h"
#include <iostream>
#include "square.h" // including the header files

using namespace std;

int main(){  

int radius,length;

Circle circle; // Displaying a circle using the default value of the radius  
circle.Display();  
Circle circ; // circle with a value supplied for the radius  

cout << "Enter the radius value :" << endl; // taking the value from the user
cin >> radius;

circ.setRadius(radius);  
circ.Display();  

Square square; // Displaying a square
square.Display();
Square squ; // square with a value supplied for the length  

cout << "Enter the length value :" << endl;
cin >> length;

squ.setLength(length); // of the base class  
squ.Display();

return 0;
}

Explanation / Answer

#include<iostream.h>
#include<conio.h>
const double PI=3.14159;
class shape
{
public:
int shapeID, type;
float measure;
virtual void getArea()
{
cout<<"Enter shape id";
cin>>shapeID;
if(shapeID==0)

}
protected:
double Radius; // radius value declared
double base; // radius value declared
double height;
double Length;
};

class Circle : public shape
{ // circle class
public:
Circle(); // declaration
void setRadius(double r); // setting the radius
double getRadius(); // getting the radius
double Area(); // get the area calculated
void Display(); // display the datda
};
class Square : public shape
{ // square structure class
public :
Square(); // declaration
void setLength(double l); // setting the length
double getLength(); // getting the length
double Area(); // get the area calculated
void Display(); // display the data

};

class tri : public shape
{ // triangle class

public:
tri();
void getValues(double x, double y);
double Area();
void Display();
};
tri::tri() // declaration
{base=0;
height=0;
}
void tri::getValues(double x, double y)
{
base=x;
height=y;
} // setting values

double tri::Area() // get the area calculated
{
double a=(base*height)/2;
return a;
}
void tri::Display() // display the datda
{
cout<<"Area of trianlge is"<<Area();
}

Circle::Circle()
{ // method declaration
Radius = 0; // initialisng the radius value
}
void Circle::setRadius(double r) {
Radius = r <= 0 ? 1 : r; // checking the input value
}
double Circle::getRadius() {
return Radius; //getting and setting the value
}
double Circle::Area(){
return Radius * Radius * PI; // returning the area
}
void Circle::Display(){ // display the data
cout << " Circle Properties";
cout << " Radius = " << getRadius();
cout << " Area = " << Area() << " ";
}

Square::Square(){ // method declaration
Length = 0; // length initialisng
}
void Square::setLength(double l) {
Length = l <= 0 ? 1 : l; // checking the data
}
double Square::getLength() {
return Length; // returning the length
}
double Square::Area() {
return Length*4; // returning the area
}
void Square::Display(){ // display the data
cout << " Square Properties";
cout << " Length = " << getLength();
cout << " Area = " << Area() << " ";
}

int main()
{
int radius,length;
//Circle circle; // Displaying a circle using the default value of the radius
//circle.Display();
Circle circ; // circle with a value supplied for the radius
cout << "Enter the radius value :" << endl; // taking the value from the user
cin >> radius;
circ.setRadius(radius);
circ.Display();
Square square; // Displaying a square
square.Display();
Square squ; // square with a value supplied for the length
cout << "Enter the length value :" << endl;
cin >> length;
squ.setLength(length); // of the base class
squ.Display();
tri T;
double b,h;
cout<<" Enter Triangle data";
cout<<" Enter base";
cin>>b;
cout<<"ENTER height";
cin>>h;
T.getValues(b,h);
T.Display();
return 0;

}

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