/*  cw1_example.cc    Written 13/8/2003 by Chris Gillespie
 *
 *  Description - Tries to predict if the user has guessed heads
 *                or tails. The output follows the rules as stated
 *  on http://www.comp.leeds.ac.uk/ai23/assessment/assessment1.html
 *  Students should change the means of guessing.
 *  
 *  Notes - altering the I/O format in this wfile is not advised
 *          if you wish to evaluate the program against the automated
 *          system.
 */


#include <iostream>
using namespace std ;

char dummy[70] ; // ignore this. 

int main()
{
   int guess_number = 1 ;
   char user ;  // what the user was thinking of
   char guess ; // what we think the next one will be
   
   do {

    // ask the user to think.
    cout << "Please think of Heads (H) or Tails (T) then press enter." << endl ;
	   
    /*	 *************************************************************
        *************************************************************

                   THIS IS THE BIT YOU SHOULD CHANGE!!!!                
                   We make our guess here.
		   
        *************************************************************
        *************************************************************
     */ 
     if ( guess_number == 1 ) {
        guess = 'H' ;
     }
     else {
        if ( user == 'H' ) {
           guess = 'H' ;
	}
        else {
           guess = 'T' ;
	}	
     }

     /* ************************************************************
        ************************************************************

        	DO NOT CHANGE ANYTHING AFTER HERE

	***********************************************************
	***********************************************************
     */
     

     // now we tell the user what our guess was,
     cin.getline(dummy, 70) ;  // wait for return key pressed
     cout << guess << endl ;


     // Find out what the user was thinking of
     // and force them to user H or T
     cin >> user ;
     cin.getline(dummy,70) ;  // clear the stream for return key press
     while ( user != 'H' && user != 'T' ) {
        cerr << "You must enter H or T" << endl ;
	cin >> user ;
	cin.getline(dummy,70);  // and again
     }
     guess_number++ ;    
     
   } while ( guess_number <= 100 ) ;

}