count = 0

 while count < 3 :

     inp_age =input('Enter your age: ')

     inp_age = int(inp_age)

     if inp_age == 18:

         print('bingo!')

         break

     else:

         print('age error')

         count += 1

         if count == 3:

             inp_game = input('carry on or rall out..Y/N: ')

             if inp_game == 'Y' or inp_game == 'y':###切记此处不可写为  inp_game == 'Y' or 'y'，此时条件永远为真！！！

                 print('go on!')

                 count = 0

             else:

                 break