assume:
a seat equals an element of the array
if value of an element in the array is zero, then seat is available
logic:
if(decision == 1)
  if no first class seats available
    display message
  else
    display message--the following seats are open
    loop through first five seats of plane 
      if value of current element of plane is zero
         display result of current index plus 1 
      use a loop to allow user selection of available seats
      loop until valid selection made or user gives up
         display request for selection
         if valid selection
           if selected seat is availble
             change value of that seat to some value other than zero
           else 
             display message that seat is already taken
        else 
           display message that seat is not part of first class

// Program: First Economy Air,  Automated Seat Reservation Program 
// This is a menu driven program that assigns seats in a 10 seat 
//airplane, then prints out a boarding pass then a seating chart
// seats 1-5 are first class and 6-10 are economy
// Amy Higgins


#include <iostream>
#include <fstream>
#include <iomanip>

using namespace std;

//function prototypes

void showMenu ();		        // Holds menu choices		
void printSeatingChart (int [], int);   // Prints to screen Array
void firstClassTicket (int [], int);      // Used to assign first class seats if availible
void economyTicket (int [], int);      // Used to assign economy seats if availible


int main()
{
    const int SEATS = 10;           // Seating capacity of airplane
    int airplane[SEATS] = {0};   // Airplane array, used to keep 
                                                // track of open and occupied seats
    int firstClass;	            //  holds the seat number reserved (1-5)
   int economy;	           // holds the seat number reserved (6-10)
    nt choice;	                // To hold a menu choice
	

   
   do
   {
         // Display the menu and get the user's choice.

          showMenu();
          cin >> choice;
      
      // Validate the menu selection.

       while (choice < 1 || choice > 3)
               {
                  cout << "Please enter 1, 2, or 3: ";
                   cin >> choice;
                }
        if (choice >= 1 || choice <= 3)            
            {
	        switch (choice)
                               {
                               case 1:  firstClassTicket(airplane, SEATS);
                                                 break;
                                case 2: economyTicket(airplane, SEATS);
                                                break;
                                case 3:  printSeatingChart(airplane, SEATS);
		                break;
                                }
            }
      }  
return 0;
}

//**************************************************
// Definition of function showMenu which displays the menu.       *
//*************************************=************

void showMenu()
{
   cout << "\n\t\tWelcom to First Economy Air\n\n";
   cout<<"======================================\n";
   cout<<" Please select an option from the menu \n";
   cout<< "below."<<endl<<endl;

   cout << "1. First Class Ticket\n";
   cout << "2. Economy Ticket\n";
   cout << "3. Exit\n\n";
   cout << "Enter your choice: ";
}
//*******************************************
// Definition of function printSeatingChart                       *
//********************************************

void printSeatingChart (int array [], int size)
{

cout<< "print seat chart, exit."<<endl;
         for(int i = 0; i < size; i++)       // Print contents of array
              {
	cout<< array[i]<<endl;
              }
}

//*****************************************
// Definition of function firstClassTicket                        *
//******************************************

void firstClassTicket (int array [], int size)
{
            // this is just a test to see if this function 
          //can read and return array values
 
     cout<< "you have purchased a First class ticket."<<endl;
	           for(int i = 0; i < size; i++)
                                 {
	                    cout<< array[i]<<endl;
                                  }
}

//*******************************************
// Definition of function economyTicket                           *
//*******************************************

void economyTicket (int array [], int size)	
{
	// this is just a test to see if this function 
               //can read and return array values

	cout<< "you have purchased a Economy ticket."<<endl;
		for(int i = 0; i < size; i++)
                                       {
	                            cout<< array[i]<<endl;
                                        }
}

do{
    //somecode
}

do{
    //somecode
}while(somecondition);