C== Design a derived class circleType. Every circle has a center and a radius. G

Question

C==
Design a derived class circleType.
Every circle has a center and a radius. Given the radius, we can determine the circle’s area and circumference. Given the center, we can determine the position in the x-y plane. The center of a circle is a point in the x-y plane. Design a class, circleType, that can store the radius and center of the circle. Because the center is a point in the x-y plane and you designed the class to capture the properties of a point in the pointType class., you must derive the class circleType from the class pointType. You should be able to perform the usual operations on a circle, such as setting the radius, printing the radius, calculating and printing the area and circumference, and carrying out the usual operations on the center.


Write a test program to test the various operations.

// Specification of circleType
class circleType: public pointType
{
public:
void print() const;
void setRadius(double r);
double getRadius() const;
double getCircumference() const;
double getArea() const;
circleType(double x = 0.0, double y = 0.0, double r = 0.0);

protected:
double radius;
};

Explanation / Answer

#include<iostream>
using namespace std;

class pointType

{

public:

      pointType(double x = 0, double y =0)

      {

           xCoordinate = x;

           yCoordinate = y;

      }

      double getX() {return xCoordinate;}

      double getY() {return yCoordinate;}

protected:

      double xCoordinate, yCoordinate;

};

// Specification of circleType
class circleType: public pointType
{
public:
void print() const;
void setRadius(double r);
double getRadius() const;
double getCircumference() const;
double getArea() const;
circleType(double x = 0.0, double y = 0.0, double r = 0.0);

protected:
double radius;
};

void circletype::print() const
{
cout <<" circle radius is "<< radius <<endl;
}

void circleType::setradius(double r)
{
radius = r;
}

double circleType::getRadius() const
{
return radius;
}

double circleType::getCircumference() const
{
return 2*3.14159*radius;
}

double circleType::getArea() const
{
return 3.14159*radius*radius;
}

int main()
{
circleType cir;
cir.setradius(5);
cout << "circle circumferenceis " << cir.getCircumference();
cout << " cirlcle Area is " << cir.getArea();
return 0;
}
}

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