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]
\ No newline at end of file
+low=0
+high=len(num_list)-1
+guess1=20
+guess2=0
+while low <= high:
+    mid=(low+high) // 2
+    guess2=num_list[mid]
+    if guess1 == guess2:
+       print("找到了",mid)
+       break
+    elif guess1 > guess2:
+         low=mid+1
+    elif guess2 > guess1: 
+        high=mid-1
\ No newline at end of file