numguess:-numGuess(100,1).
numGuess(Top,Bottom):-write('Is your number less than '),Middle is truncate((Top + Bottom) / 2),write(Middle),write('? [y/n]'),read(y), numGuess(Middle - 1,Bottom).
numGuess(Top,Bottom):-write('Is your number greater than '),Middle is truncate((Top + Bottom) / 2),write(Middle),write('? [y/n]'),read(y), numGuess(Top,Middle + 1).
numGuess(Top,Bottom):-write('Your number is '),Middle is truncate((Top + Bottom) / 2),write(Middle),write('.').