Enhance the face drawing in Display 18.17 in all of the following ways: Add color so the eyes are blue and the mouth is red. When the face winks, the line that represents a closed eye is black not blue. Add a nose and a brown handlebar mustache. Add buttons labeled “Smile” and “Frown”. When the “Frown” button is clicked, the face shows a frown (upside down smile); when the “Smile” button is clicked, the face shows a smile. When the user clicks the close-window button, a window pops up to ask if the user is sure he or she wants to exit, as in Display 18.2.
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