save project

my_search.py

-import random
+# import random
 
 
-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
+# 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):
+
+# import random
+
+list=[]
+for i in range(1001):
+    list.append(i)
+num1=random.randint(500,600)
+def erfen_search(alist,num):
+    low=0
+    high=len(alist)-1
+    while low<=high:
+        mid=(low+high)//2
+        guess=alist[mid]
+        if guess==num:
+            return mid
+        elif guess<num:
+            low=mid+1
+        else:
+            high=mid-1
+    return None
+result=erfen_search(list,num1)
+print(result)
 
 
-def binary_search(alist,num):
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