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
-zhoude=9
+zhaode=int(input("请输入你要找的数:"))
 num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
 num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
 min=0
 min=0
 max=len(num_list)-1
 max=len(num_list)-1
 while min<=max:
 while min<=max:
     mid=(min+max)//2
     mid=(min+max)//2
     caide=num_list[mid]
     caide=num_list[mid]
-    if caide==zhoude:
+    if caide==zhaode:
         print("找到了",mid)
         print("找到了",mid)
         break
         break
-    elif caide<zhoude:
+    elif caide<zhaode:
         min=mid+1
         min=mid+1
-    elif caide>zhoude:
-        min=mid-1
-    else:
-        print("没有这个数")
+    elif caide>zhaode:
+        max=mid-1
\ No newline at end of file