save project

my_search.py

@@ -3,20 +3,19 @@ import random
 alist = []
 alist = []
 for i in range(1, 101):
 for i in range(1, 101):
     alist.append(i)
     alist.append(i)
-num =
+num =random.choice(alist)
 # 请完善二分查找函数binary_search(),查找出num在列表alist里面的索引位置
 # 请完善二分查找函数binary_search(),查找出num在列表alist里面的索引位置
 
 
-def binary_search(alist,num_list):
+def binary_search(alist,num):
     low=0
     low=0
     high=len(alist)-1
     high=len(alist)-1
-    num=
-    while low<high:
+    while low<=high:
         mid=(low+high)//2
         mid=(low+high)//2
-        gues=alist[mid]   
-            print(num,"的索引是",mid)
-            break
+        guess=alist[mid] 
+        if guess==num:  
+            return mid
         elif guess<num:
         elif guess<num:
             low=mid+1
             low=mid+1
         else:
         else:
             high=mid-1
             high=mid-1
-
+print(binary_search(alist,num))