Primarily using DEV C$++$ for doing coding.

This is my code with correct output and the question is below the coding and the sample output needed is given below.

#include

#include

using namespace std;

class Shapes

$\{$

private:

int parameter$1,$ parameter$2$;

public:

$//$ Member function to accept inputs

void getParameters$()$

$\{$

cout $<<$ "Enter the first parameter$($length of a rectangle, or base of a triangle$)$: $"$;

cin $>>$ parameter$1$;

cout $<<$ "Enter the second parameter$($height of a rectangle$/$triangle$)$: $"$;

cin $>>$ parameter$2$;

$\}$

$//$ Member function to calculate area of rectangle

void rectangleArea$()$

$\{$

float area $=$ parameter$1*$ parameter$2$;

cout $<<$ "Area of rectangle: $"<<$ area $<<"."<<$ endl;

$\}$

$//$ Member function to calculate area of triangle

void triangleArea$()$

$\{$

float area $=0\mathrm{.}5*$ parameter$1*$ parameter$2$;

cout $<<$ "Area of triangle: $"<<$ area $<<"."<<$ endl;

$\}$

$\}$;

int main$()$

$\{$

$//$ Create an object of the Shapes class

Shapes shapeObj;

$//$ Call member function to accept inputs

shapeObj.getParameters$()$;

$//$ Use do$-$while loop

do

$\{$

string choice;

$//$ Read the shape choice from the user

cout $<<$ "Select shape $(\text{'}$R$\text{'}$ for rectangle, and $\text{'}$T$\text{'}$ for triangle$)$: $"$;

cin $>>$ choice;

$//$ If choice is $\text{'}$R$\text{'},$ then call rectangleArea$()$ method

if $($choice $=="$R$")$

$\{$

shapeObj.rectangleArea$()$;

$\}$

$//$ If choice is $\text{'}$T$\text{'},$ then call triangleArea$()$ method

else if $($choice $=="$T$")$

$\{$

shapeObj.triangleArea$()$;

$\}$

$//$ Else print Invalid message

else

$\{$

cout $<<$ "Invalid choice." $<<$ endl;

$\}$

$\}$ while $($true$)$; $//$ Infinite loop, user can exit as per their choice

return $0$;

$\}$

QUESTION.

Implement a new derived class called $$ShapesExtend$.[10$marks$]$

$-$ This class should inherit from the base class $$Shapes$$ that you have designed before.

$-$ In this class, implement additional methods to check for the input values. If the values are equal, and the choice for shape is a rectangle, then modify the output to $$Area of square is$...$

Sample Output:

Enter the first parameter $($length of a rectangle, or base of a triangle$)$: $8$

Enter the second parameter $($height of a rectangle$/$triangle$)$: $8$

Select shape $($R$$ for rectangle, and $$T$$ for triangle$)$: C Invalid choice.

Select shape $($R$$ for rectangle, and $$T$$ for triangle$)$: R

Area of the square is $64.$