Need Assisstance in correcting my Reference Menu.cpp

[mambaki117]

Below I have put together a rough draft of my Menu for my final project. It looks to be okay but the program will not run. Any suggestions would be nice.

/*
APP/CPP/FOLDER: Ref_Menu_Elliott
This program uses a reference variable as a function
parameter.
INSTRUCTIONS: Type this code line by line first (with comments), then seek to solve
               the various programming challenges herein.
Base code from Gaddis (2012).
Expanded by: Dr. Tyson McMillan, 10-18-2014
Updated by  
Student: Christopher Elliott a.k.a. "Mamba Ki", 11-29-2016

A menu using the Power of functions that pass values by reference.
When a function uses pass by refrence, it can manipulate variable values outside
of its own scope. Reference refers to the memory location of the variable.
*/
#include <iostream>
#include <cstdlib> //to be able to use system("cls"); in multiple platforms
using namespace std;

// Function prototype. The parameter is a reference variable.
void doubleNum(int &);
void increaseNum(int &);
void decreaseNum(int &);
void displayMenu();
void displayPatterns();

int main()
{
setColor(10);
   int value = 4;
   cout << "In main, value is " << value << endl;
   cout << "Now calling doubleNum..." << endl;
   doubleNum(value);
   cout << "Now back in main. value is " << value << endl;
   
   //using the pass by reference premise on a C++ menu
   cout << "\n\nLet's practice this premise on a C++ Menu" << endl;
   displayMenu(); //function call
   
   /*Programming Challenges
     1) Add 4 more menu items to this program.
     2) Validate input of decision
     3) Display a custom Exit message when -9 inputted;
     4) Add color to enhance messages to the user.
     hint: much of this is done in the displayMenu() function definition
    */
   
   //EXTRA Challenge: displayPatterns()
   displayPatterns(); //see function definition below
       
   return 0;
}

//**********************************************************
// Definition of doubleNum.                                *
// The parameter refVar is a reference variable. The value *
// in refVar is doubled.                                   *
//**********************************************************

void doubleNum(int &refVar)
{
   refVar *= 2;
}

void increaseNum(int &counter)
{
   counter++;
}

void decreaseNum(int &counter)
{
   counter--;
}

void displayMenu()
{
   int mainDecision = 0;
   int greenTeaCounter = 0;
int lobsterTailCounter =0;
int oatmealCookieCounter =0;
int kahunaSaladCounter =0;
int vinegarChipsCounter =0;
   
   do
   {
        if(mainDecision == 0) //first run of the menu
        {
            cout << "\n************WELCOME TO MAMBA KI'S  RESTAURANT!!!************" << endl;      
        }
        
        //increment menu item
        if(mainDecision  == 1)
        {
            increaseNum(greenTeaCounter);       
        }

//increment menu item
if(mainDecision ==2)
{
increaseNum(lobsterTailCounter);
}

//increment menu item
if(mainDecision ==3)
{
increaseNum(oatmealCookieCounter);
}

//increment menu item
if(mainDecision ==4)
{
increaseNum(kahunaSaladCounter);
}

//increment menu item
if(mainDecision ==5)
{
increaseNum(vinegarChipsCounter);
}
        
        //decrement menu item
        if(mainDecision  == -1)
        {
            if(greenTeaCounter != 0) //subtract only if value greather than 0
            {
                decreaseNum(greenTeaCounter);
            }
            else
            {
                cout << "Negative: Green Tea Order must be > 0 to ";
                cout << "subtract (please try again)" << endl;  
            }
        }

//decrement menu item
        if(mainDecision  == -2)
        {
            if(lobsterTailCounter != 0) //subtract only if value greather than 0
            {
                decreaseNum(lobsterTailCounter);
            }
            else
            {
                cout << "Negative: Lobster Tail Order must be > 0 to ";
                cout << "subtract (please try again)" << endl;  
            }
        }

//decrement menu item
        if(mainDecision  == -3)
        {
            if(oatmealCookieCounter != 0) //subtract only if value greather than 0
            {
                decreaseNum(oatmealCookieCounter);
            }
            else
            {
                cout << "Negative: Oatmeal Cookie Order must be > 0 to ";
                cout << "subtract (please try again)" << endl;  
            }
        }

//decrement menu item
        if(mainDecision  == -4)
        {
            if(kahunaSaladCounter != 0) //subtract only if value greather than 0
            {
                decreaseNum(kahunaSaladCounter);
            }
            else
            {
                cout << "Negative: Kahuna Salad Order must be > 0 to ";
                cout << "subtract (please try again)" << endl;  
            }
        }

//decrement menu item
        if(mainDecision  == -5)
        {
            if(vinegarChipsCounter != 0) //subtract only if value greather than 0
            {
                decreaseNum(vinegarChipsCounter);
            }
            else
            {
                cout << "Negative: Vinegar Chips Order must be > 0 to ";
                cout << "subtract (please try again)" << endl;  
            }
        }
   
        cout << "\n\nMENU" << endl;
        cout << "Item *********** [ Count ]" << endl;   
        cout << "1) Green Tea *** [ " << greenTeaCounter << " ] -1 to remove" << endl;
cout << "2) Lobster Tail *** [ " << lobsterTailCounter << " ] -2 to remove" << endl;
cout << "3) Oatmeal Cookie *** [ " << oatmealCookieCounter << " ] -3 to remove" << endl;
cout << "4) Kahuna Salad *** [ " << kahunaSaladCounter << " ] -4 to remove" << endl;
cout << "5) Vinegar Chips *** [ " << vinegarChipsCounter << " ] -5 to remove" << endl;
        cout << "Please enter an item number above (-9 to exit): ";
        cin >> mainDecision;
        //clear the screen
        system("cls");
     
   }while(mainDecision != -9); //-9 is my exit condition
}

void displayPatterns()
{
       //nested = for loop with another for loop in its scope.
       //this was the case with bubble sort
       
       /*EXTRA programming challenge1
   use nested for loops OR one loop to display this pattern:
   
   *******
   *******
   *******
   
   */
   
    /*EXTRA programming challenge2
   use nested for loops to display this pattern:
   
   *
   **
   ***
   ****
   *****
   ******
   *******
   
   */
   
       /*EXTRA programming challenge3
   use nested for loops to display this pattern:
   
   *******
   ******
   *****
   ****
   ***
   **
   *
*/
}