C++ Please read the entire question before writing your code and make sure that

Question

C++

Please read the entire question before writing your code and make sure that the output matches the given example!

Note: largerArea() must not produce terminal output, the value must be passed to the caller
through the result pointer variable.

Question: Download lab12_Q2.cpp . The following function accepts objects by reference and indicates the result of the operation by storing a value in the variable pointed to by result. Implement the function using the classes defined in Question 1. (Question 1 is added at the ended for reference to answer this question)
/**
* Determines the larger area between two Shape objects
* The larger area is stored in result
*/
void largerArea(Shape &a, Shape &b, double *result);
Use the given driver program to produce the following output:

Output:

This Triangle has a perimeter of: 12 and an area of: 6

The circle has a perimeter of: 12.5664 and an area of:12.56564

The larger area is:12.5664

This Triangle has a perimeter of: 24 and an area of: 24

The circle has a perimeter of: 12.5664 and an area of:12.56564

The larger area is:24

Press any key to continue...

Lab12_Q2.cpp is given below:

#include<iostream>
#include<math.h>
#include<string>
using namespace std;

class Shape {
public:
virtual string getType() = 0;
virtual double getPerimeter() = 0;
virtual double getArea() = 0;
};

//Implement class Triangle here

//Implement class Circle here

void describeShape(Shape &s) {
double a = s.getArea();
double p = s.getPerimeter();
string t = s.getType();

cout << "This " << t << " has a perimeter of: " << p
  << " and an area of: " << a << endl;
}

/**
* Determines the larger are between the two Shape objects
* The larger area is stored in result
*/
void largerArea(Shape &a, Shape &b, double *result) {
//Complete the function
}

int main() {
Triangle t;
Circle c;
c.setDims(2);
t.setDims(3, 4, 5);

describeShape(t);
describeShape(c);

double result;
largerArea(t, c, &result);
cout << "The larger area is: " << result << endl << endl;

t.setDims(6, 8, 10);
describeShape(t);
describeShape(c);
largerArea(t, c, &result);
cout << "The larger area is: " << result << endl;

return 0;
}

*********************************************************************************************************************************************************************************************************

Reference: Question 1

Please do not modify the driver program. No state pertaining to the Triangle or Circle may be stored in the Shape objects. Use Heron’s formula for calculating the area of a Triangle:
A = (s (s - a)(s - b)(s - c)), s = (a + b + c)/2

Question:

Download lab12_Q1.cpp . Triangles, and Circles are Shapes, geometric objects which can havetheir perimeter and area calculated. Imple ment a Shape abstract class , which can be used in the following manner:
void describeShape(Shape &s) {
double area = s.getArea();
string type = s.getType();
double perim = s.getPerimeter();
cout << “This “ << type << “ has a perimeter of: “
<< perim << “ and an area of: “ << area << endl;
}
The Shape class is provided for you. Impleme nt Triangle and Circle classes and use the given driver program to produce the following output:

Output:

The triangle has a permieter of: 12 and an area of: 6

The Circle has a perimeter of: 25.1328 and an area of: 50.2656

Press any key to continue...

Lab12_Q1.cpp given below:

#include<iostream>
#include<math.h>
#include<string>
using namespace std;

class Shape {
public:
virtual string getType() = 0;
virtual double getPerimeter() = 0;
virtual double getArea() = 0;
};

//Implement class Triangle here

//Implement class Circle here

void describeShape(Shape &s) {
double a = s.getArea();
double p = s.getPerimeter();
string t = s.getType();

cout << "This " << t << " has a perimeter of: " << p
  << " and an area of: " << a << endl;
}

int main() {
Triangle t;
Circle c;
c.setDims(4);
t.setDims(3, 4, 5);

describeShape(t);
describeShape(c);

return 0;
}

Explanation / Answer

#include<iostream>
#include<math.h>
#include<string>
using namespace std;

class Shape {
public:
virtual string getType() = 0;
virtual double getPerimeter() = 0;
virtual double getArea() = 0;
};

//Implement class Triangle here
class Triangle :public Shape
{
   private:
   int s1,s2,s3;
  
   public:
   string getType()   //overriding pure virtual functions
   {
       return "triangle";
   }
   double getPerimeter()
   {
    return (s1+s2+s3);
   }
double getArea()
{
   double s = (s1+s2+s3)/2;
   return (sqrt(s*(s-s1)*(s-s2)*(s-s3)));
}
   void setDims(int s1,int s2,int s3)
   {
       this->s1 = s1;
       this->s2 = s2;
       this->s3 = s3;
      
   }
  
};

//Implement class Circle here
class Circle:public Shape
{
private:
int radius;

public:
   string getType()     //overriding pure virtual functions
   {
      return "circle";
   }
   double getPerimeter()
{
   return (2*3.14*radius);
}
virtual double getArea()
{
   return (3.14*radius*radius);
}
void setDims(int radius)
{
this->radius = radius;  
}
};

void describeShape(Shape &s) {
double a = s.getArea();
double p = s.getPerimeter();
string t = s.getType();

cout << "This " << t << " has a perimeter of: " << p
<< " and an area of: " << a << endl;
}

/**
* Determines the larger are between the two Shape objects
* The larger area is stored in result
*/
void largerArea(Shape &a, Shape &b, double *result)
{
if(a.getArea() > b.getArea())
*result = a.getArea();
else
*result = b.getArea();

}

int main() {
Triangle t;
Circle c;
c.setDims(2);
t.setDims(3, 4, 5);

describeShape(t);
describeShape(c);

double result;
largerArea(t, c, &result);
cout << "The larger area is: " << result << endl << endl;

t.setDims(6, 8, 10);
describeShape(t);
describeShape(c);
largerArea(t, c, &result);
cout << "The larger area is: " << result << endl;

return 0;
}

Output:

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