save project

my_search.py

-import random
+bingo_num = 7
+num_list = [1,3,5,8,11,15,17,18,20,21]
 
 
-alist = []
-for i in range(1, 101):
-    alist.append(i)
-num = random.choice(alist)
+low = 0
+high = len(num_list)-1
+while low <= high:
+    mid = (low + high) // 2
+    guess =num_list[mid]
+    if guess == bingo_num:
+        print("找到了，它的索引是：",mid)
+        break
+    elif guess < bingo_num:
+        low = mid + 1
+    else:
+        high = mid -1
 # 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 binary_search(alist,num):
\ No newline at end of file
+    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 = binary_search(num_list,21)
+print(result)
\ No newline at end of file