save project

my_search.py

@@ -6,4 +6,16 @@ for i in range(1, 101):
 num = random.choice(alist)
 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 bin
\ No newline at end of file
+def binary_search(alist,num):
+    low = 0
+    high = len(alist)-1
+    while high >= low:
+        mid = (high + low) // 2
+        if alist[mid] == num:
+            return mid
+        elif alist[mid] > num:
+            high mid -1
+    return "NO FOUND"
+ flag = binary_search(alist ,num)  
+ print(str(num)+"的索引是"+str(flag)) 
\ No newline at end of file