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