$```$

#include

using namespace std;

$//$ Specification for the IntStack class

class IntStack

private:

int $*$stackArray; $//$ Pointer to the stack array

int stackSize; $//$ The stack size

int top; $//$ Indicates the top of the stack

public:

$//$ Constructor

IntStack$($int$)$;

$//$ Copy constructor

IntStack$($const IntStack &$)$;

$//$ Destructor

~IntStack$()$;

$//$ Stack operations

void push$($int$)$;

void pop$($int &$)$;

bool isFull$()$ const;

$``````$

bool isEmpty$()$ const;

$\}$;

$//$ Specification for the MathStack class

class MathStack : public IntStack

$\{$

public:

$//$ Constructor

MathStack$($int s$)$ : IntStack$($s$)\{\}$

$//$ MathStack operations

void add$()$;

void sub$()$;

$//$ TO DO $1$: Add below the declaration for the multiplication function

$//$ TO DO $2$: Add below the declaration for the division function

$//$ TO DO $3$: Add below the declaration for the modulus function

$\}$;

$``````$

$//$ The main function section below demonstrates usage of the MathStack class.

int main$()$

$\{$

int catchVar; $//$ To hold values popped off the stack

const int STACK$\_$SIZE $=2$; $//$ The minimum number of integers that the

$//$ stack can hold

$//$ Note that this usage portion of the MathStack class can be enhanced to

$//$ be user interactive. However, for this project and ease for the

$//$ evaluation, please simply use the non$-$interactive form below.

$//$ Create a MathStack object.

MathStack stack$($STACK$\_$SIZE$)$;

$//$ Push $3$ and $6$ onto the stack.

cout $$ "Pushing $3$

$"$;

stack.push$(3)$;

cout $$ "Pushing $6$

$"$;

stack.push$(6)$;

$//$ Add the two values.

stack.add$()$;

$//$ Pop the sum off the stack and display it$.$

cout $$ "The sum is $"$;

$``````$

stack.pop$($catchVar$)$;

cout $$ catchVar $$ endl $$ endl;

$//$ Push $7$ and $10$ onto the stack

cout $$ "Pushing $7$

$"$;

stack.push$(7)$;

cout $$ "Pushing $10$

$"$;

stack.push$(10)$;

$//$ Subtract $7$ from $10.$

stack.sub$()$;

$//$ Pop the difference off the stack and display it$.$

cout $$ "The difference is $"$;

stack.pop$($catchVar$)$;

cout $$ catchVar $$ endl;

$//$ TO DO $7$: Provide below usage for the multiplication

$//$ TO DO $8$: Provide below usage for the division

$```$