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
+guess = 15
+low = 0
+high= len(num_list)-1
+while low<=high:
+    mid=(low+high)//2 
+   
+    if guess == num_list[mid]:
+        print(mid)
+        print("找到了")
+        break
+    elif num_list[mid]<guess:
+        low=mid + 1
+    else:
+        high=mid-1
+if low>high:
+    print("找不到")
\ No newline at end of file