save project

binary_search.py

@@ -3,14 +3,14 @@ sb=15
 num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21,2]
 num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21,2]
 low=0
 low=0
 high=len(num_list)-1
 high=len(num_list)-1
+while low<=high:
 
 
-
-
-mid=(high+low)//2
-guess=num_list[mid]
-if guess==sb:
-    print("找到了，它在列表的索引是："mid)
-elif guess<sb:
-    low=mid+1
-elif guess<sb:
-    high=mid-1
+    mid=(high+low)//2
+    guess=num_list[mid]
+    if guess==sb:
+        print("找到了，它在列表的索引是：",mid)
+        break
+    elif guess<sb:
+        low=mid+1
+    elif guess<sb:
+        high=mid-1
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