auto save

my_search.py

-import random
+a=[1,3,5,8,11,15,17,18,20,21]
+low=0
+h=len(a)-1
+shu=1         #找的数
 
-alist = []
-for i in range(1, 101):
-    alist.append(i)
-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
-
-def binary_search(alist,num):
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+while low<=h:
+    mid = (low+h)//2
+    g=a[mid]
+    if g==shu:
+        print("找到了",mid)
+        break
+    elif g <shu:
+        low = mid+1
+    elif g>shu:
+        h = mid-1
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