save project

my_search.py

@@ -4,6 +4,22 @@ alist = []
 for i in range(1, 101):
     alist.append(i)
 num = random.choice(alist)
+print(num)
 # 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):
+    low = 0
+    high = len(alist) - 1   
+    while low <= high:
+        mid = (low + high) //2
+        if alist[mid] == num:
+            return mid
+        elif num > alist[mid]:
+            low = mid + 1
+        else:
+            high = mid - 1
+
+out = binary_search(alist,num)
+print(out)
+
+