18 lines
484 B
Plaintext
18 lines
484 B
Plaintext
FUNCTION binary_search ( array() AS Integer, value AS Integer, lo AS Integer, hi AS Integer) AS Integer
|
|
DIM middle AS Integer
|
|
|
|
IF hi < lo THEN
|
|
binary_search = 0
|
|
ELSE
|
|
middle = (hi + lo) / 2
|
|
SELECT CASE value
|
|
CASE IS < array(middle)
|
|
binary_search = binary_search(array(), value, lo, middle-1)
|
|
CASE IS > array(middle)
|
|
binary_search = binary_search(array(), value, middle+1, hi)
|
|
CASE ELSE
|
|
binary_search = middle
|
|
END SELECT
|
|
END IF
|
|
END FUNCTION
|