15-110 Sections G-J / Spring 2010 / Quiz 4

 

Part 1)     [20pts] Written Quiz in Class (8 minutes)

Write isPeculiar and nthPeculiar.  (Students were provided with a brief description of "peculiar" numbers (an invented term) -- that is, positive integers that have only odd factors (that is, they have no even factors).)

Part 2)  [80pts] Programming Quiz in Recitation (25 minutes)

• Students should log in, and have full access to the course notes, but nothing else (not the online API, nothing from resources, only links off of the "schedule" page).

• Students should download DrawImages.java and EditImages.java, and also download sampleImage.jpg.

• Students will have 25 minutes to write 2 programs:
   

  • Write a program, Program1.java, that reads in the image in sampleImage.jpg and pixel-by-pixel creates the mirror image, which it then writes to mirrorImage.jpg. The mirror image has the left and right flipped, as in a mirror.
     

  • Say we have 30% A's, 40% B's, 20% C's, and 10% D's in our class. Write a program, Program2.java, that displays this information in a pie chart that is centered and fills half the window. Be sure to use different colors and label each arc.
     

• Students should email their code, as two attachments, to their CA at the end of the quiz.