Commit 0090694b by BellCodeEditor

save project

parent c44e7922
Showing with 15 additions and 0 deletions
......@@ -7,3 +7,17 @@ num = random.choice(alist)
# 请完善二分查找函数binary_search(),查找出num在列表alist里面的索引位置
def binary_search(alist,num):
low = 0
high = len(alist)-1
while low <= high:
mid = (low+high)//2
guess_num = alist[mid]
if guess_num == num:
return mid
elif guess_num < num:
low = mid+1
elif guess_num > num:
high = mid-1
return None
rest = binary_search()
print(rest)
\ No newline at end of file
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