PPT Slide

Writing Methods--Repaired Example

/**

* Calculate the recurrence relation, r(n) = r(n-1) +

* r(n-2) - r(n-3), where: r(1)=1, r(2)=2, r(3)=3, n>=1.

* @param is the value of recurrence relation to calculate.

* @return the integer value of the recurrence relation at n.

public int recurrence (int iN)

{

util.ASSERT ( iN >= 1, “int param is less than 1”);

return (iN);

} // of recurrence

Lesson: while creating code that works, remember to think!