save project

binary_search.py

 # 使用二分查找法，找出9和20在列表里面的索引
 # 使用二分查找法，找出9和20在列表里面的索引
 num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
 num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
+
+        high=mid-1
 low=0
 low=0
 high=len(num_list)-1
 high=len(num_list)-1
 num=20
 num=20
@@ -12,8 +14,6 @@ while low<=high:
     elif guess<num:
     elif guess<num:
         low=mid+1
         low=mid+1
     else:
     else:
-        high=mid-1
-