Android™ How to Program, Second Edition

Implementing Counter-Controlled Repetition in Class GradeBook

Class GradeBook (Fig. C.2) contains a constructor (lines 11–14) that assigns a value to the class’s instance variable courseName (declared in line 8). Lines 17–20, 23–26 and 29–34 declare methods setCourseName, getCourseName and displayMessage, respectively. Lines 37–66 declare method determineClassAverage, which implements the class-averaging algorithm described by the pseudocode in Fig. C.1.

Line 40 declares and initializes Scanner variable input, which is used to read values entered by the user. Lines 42–45 declare local variables total, gradeCounter, grade and average to be of type int. Variable grade stores the user input.

The declarations (in lines 42–45) appear in the body of ...