Programming and Problem Solving with Java

CASE STUDY

186

The method that returns the name is trivial.

The method that returns a score requires some thought. We receive an integer in the

range of 1 to 3, and use this value to select the score to return. The key word here is “se-

lect.” We use a selection control structure to make the choice. As we’re selecting just

one item from a list, a nested ifstructure is appropriate.

Oh! What do we do if the score number isn’t an acceptable value? This spot would be

a good place to throw an exception, but we haven’t seen how to do that yet. Instead,

let’s return an invalid score value, such as 1.

The equalStatusmethod for the status field is quite simple. We just compare the pa-

rameter to the field and return the booleanresult, as both are simple types.

equalStatus (int test status) returns boolean

returnstatus == test status

knowScore(int score number) returns int

ifscore number is 1

returnmy score1

else ifscore number is 2

returnmy score2

else ifscore number is 3

returnmy score3

else

return– 1

ifscore number is 1

returnscore1

else ifscore number is 2

returnscore2

else ifscore number is 3

returnscore3

else ????

knowName() returns Name

returnmy name

constructor Student (Name student name, int score1, score2, score3)

Set my name to student name

Set my score1 to score1

Set my score2 to score2

Set my score3 to score3

Set average to (score1 + score2 + score3)/3

ifaverage >= 70

Set status to PASSING

else

ifaverage >= 60

Set status to MARGINAL

else

Set status to FAILING