C++ program, Added IF statments and conditions

***  CODE START ***

/*
REFECTORY INTERVIEW HEADER
- - - - - - ** - - - - - -

AUTHOR                  BEN LACEY [20026111]
COPYRIGHT            DECEMBER 2007
CREATED                  06/12/2007  11:55 AM
LAST UPDATED      14/12/2007      03:04 PM
*/


#include<iostream.h>
#include<stdlib.h>
void main()
{// Start Main Program


      //Variables Used In Program
      int nCounter=0;                  //INITIALISE nCounter with 0
      char chRefecAns=0;            //INITIALISE chRefecAns with 0
      char chServAns=0;            //INITIALISE chServAns with 0
      int nRefecCount=0;            //INITIALISE nRefecCount with 0
      int nServHappyCount=0;      //INITIALIZE nServCount with 0
      double nServPercent=0;      //INITIALIZE nServPercent with 0
      double nRefecPercent=0;      //INITIALIZE nRefecPercent with 0
      
      //Counter Values For Food Selection
      int nSandwichCount=0;            
      int nSaladCount=0;
      int nPotatoCount=0;
      int nSnackCount=0;
      int nMealCount=0;
      int nSelection=0;            // Used in the SWITCH statment

      

      for(nCounter=0; nCounter<10; nCounter++)      //Set the program to loop x amount of times
            {// Start The Counted Program Loop

            // Ask Question 1
            cout << "Do you use the refectory regularly?" << endl;
            cout << "Enter Y (for yes) or N (for no): ";
            cin >> chRefecAns;
            cout << endl;

            if ((chRefecAns == 'Y') || (chRefecAns == 'y')) //Make sure user types a Y or y
            {//Validate Answer For Question 1, If YES Run The Code Below This Line
                  //Update the refectory usage counter if Question 1 = Yes
                  nRefecCount++; //This is the count of the people who said YES to Question 1
                  

                  // Ask Question 2
                  cout << "Are you happy with the service provided?" << endl;
                  cout << "Enter Y (for yes) or N (for no): ";
                  cin >> chServAns;
                  cout << endl;
            
                  //Update the Service Happy Counter if Question 2 = Yes
                  if ((chServAns == 'Y') || (chServAns == 'y'))
                  {
                        nServHappyCount++;      //Increment Counter for Service Users
                  }// End Second Question
            }//End Validation for Question 1, Question 2, and Question 2 Validation


            cout << endl << endl;
            cout << "Please tell us what you bought" << endl;
            cout << "Enter the appropiate number (1)-(5):" << endl;
            cout << "  (1)   a sandwich" << endl;
            cout << "  (2)   a salad" << endl;
            cout << "  (3)   a baked potato" << endl;
            cout << "  (4)   a hot snack" << endl;
            cout << "  (5)   a full meal" << endl;
            cout << endl;
            cout << "Selection: ";
            cin >> nSelection;


                  switch(nSelection)
                  {
                        case 1: nSandwichCount++; system("cls"); break;
                        case 2: nSaladCount++; system("cls"); break;
                        case 3: nPotatoCount++; system("cls"); break;
                         case 4: nSnackCount++; system("cls"); break;
                        case 5: nMealCount++; system("cls"); break;
                  }
      }// End Counted Program Loop

      

      // When 300 Students have been asked output the results
      nRefecPercent=((float)nRefecCount / (float)nCounter) * 100;
      nServPercent=((float)nServHappyCount / (float)nCounter) *100;
      cout << endl;


      //End Report Shown to Users when all students have been interviewed
      cout << "of " << nCounter << " students interviewed:" << endl;
      cout << nRefecPercent << "% are regular users" << endl;
      cout << "of these:" << endl;
      cout << nServPercent << "% are happy with the service" << endl;
      cout << endl << endl;

      
      //Purchase Information
      cout << "Of the " << nCounter << " refectory users interviwed, the purchases were:" << endl;
      cout << "  " << nSandwichCount << "   bought a sandwich" << endl;
      cout << "  " << nSaladCount << "   bought a salad" << endl;
      cout << "  " << nPotatoCount << "   bought a baked potato" << endl;
      cout << "  " << nSnackCount << "   bought a hot snack" << endl;
      cout << "  " << nMealCount << "   bought a full meal" << endl;
      cout <<      endl;
}// End Main Program

*** CODE END ***


I have a problem with the above code. What i need to do is as follows:-
1. i need to accept Y, y, N, n, X, x for the first prompt.  for question 2 you can have the responces "Y, y, N, n"

if anything different then have "unrecognised input - please re-enter" be shown on screen.


2. with the food i need it to show the message "unrecognised food choice - please re-enter"
     if anything other that 1,2, 3, 4, 5


if for question 1 they answer N or n it will bypass question 2 and ask for a food item.



what i have tried so far:-
*********
for(nCounter=0; nCounter<10; nCounter++)      //Set the program to loop x amount of times
      { // Start The Counted Program Loop

            // Ask Question 1
            do
            {
              cout << "Do you use the refectory regularly?" << endl;
            cout << "Enter Y (for yes), N (for no) or X (to quit): ";
              cin >> chRefecAns;
            cout << endl;
            }
            while (!(chRefecAns=='Y') && (chRefecAns=='y') && (chRefecAns=='N') && (chRefecAns=='n') && (chRefecAns=='X') && (chRefecAns=='x'));
********


This does not work as needed, and i have done this for question 2 also. i keep getting confused with all the brackets and im new to C++. All other online references are confusing me further.