save project

my_search.py

@@ -7,16 +7,18 @@ 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):
 def binary_search(alist,num):
+    high=len(alist)-1
+    low=0
     while low<=high:
     while low<=high:
-    a=(high+low)//2
-    if num_list[a]==num:
-        print(a,num)
-        exit()
-    elif num>num_list[a]:
-        low=a+1
-        a=(high+low)//2
-    else:
-        high=a-1
         a=(high+low)//2
         a=(high+low)//2
+        if alist[a]==num:
+            print(a,num)
+            exit()
+        elif num>alist[a]:
+            low=a+1
+            
+        else:
+            high=a-1
+            
 goal=binary_search(alist,num)
 goal=binary_search(alist,num)
 print(goal)
 print(goal)
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