Homework #9

• Exercises P11.4, P11.6
• Provide a class Grade that stores a letter grade (A+, A, A-, B+, B, B-, C+, C, C-, D+, D, D-, F). The class should implement the Measurable interface. The measurement of a letter grades is

  Letter Grade (without +/-)	Number grade
  A	4
  B	3
  C	2
  D	1
  F	0

  Add 0.3 for a + and subtract 0.3 for a -.
  Be sure to supply a constructor

  /**
    * Constructs a Grade object from a string
    * Precondition: s is a legal grade (A+, A, A-, B+, B, B-, C+, C, C-, D+, D, D-, F)
    * @param s the string describing the letter grade
    */
  public Grade(String s)

• Do Exercise P11.17 for the Grade class:

  public class Grade implements Measurable, Formattable
  {
     . . .
     public void formatTo(Formatter formatter, int flags, int width, int precision)
     {
        . . .
     }
  }

  As in P11.17, ignore the flags and precision.

Submit a zip file hw9_xyzw with the files

• DataSet.java, DataSetTester.java
• PerimeterMeasurer.java, PerimeterMeasurerTester.java. (Use DataSet2.java from Special Lab 10 in your tester to avoid conflict with P11.4)
• Grade.java, GradeMeasureTester.java, GradeFormatTester.java