CpSc 428/628
                   Answers to Smalltalk Exercises


1.
     kittie cat
     feline is kittie cat
     canine is dog

2.
     an error message, because at:put: is not defined for MyClass instances

3.
     error message: MyClass1 does not understand message "set:"

     2
     15


4.
(a)

     75.0

(b)

     count

       |gradecount|
     
       gradecount := 0.

       grades do: [:g | gradecount := gradecount + 1].

       ^gradecount

or:

     count

       ^ grades size