Created
October 15, 2020 17:15
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| clear | |
| Dimension aNum(1) | |
| For i = 1 to 100 | |
| Dimension aNum(i) | |
| aNum(i) = i * 2 | |
| EndFor | |
| ?binary_search(@aNum, 1, Alen(aNum, 1), 10) | |
| * Binary search | |
| Function binary_search(aItems, nIndex, nLength, nValue) | |
| If nLength >= nIndex | |
| nMiddle = nIndex + (nLength - nIndex) | |
| Do case | |
| case nValue == aItems[nMiddle] | |
| Return nMiddle | |
| Case aItems[nMiddle] > nValue | |
| Return binary_search(@aItems, nIndex, nMiddle - 1, nValue) | |
| Otherwise | |
| Return binary_search(@aItems, nMiddle + 1, nLength, nValue) | |
| EndCase | |
| EndIf | |
| Return -1 && not found. | |
| EndFunc |
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