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
+n=int(input("输入:"))
+
+while 1:
+    mid=(low+high)//2
+    num=num_list[mid]
+    if num==n:
+        print(mid)
+        break
+    elif num<n:
+        low=mid+1
+    elif num>n:
+        high=mid-1
+    if high<low:
+        print("没找到")
+        break
\ No newline at end of file