save project

my_search.py

+# 什么都没有输出，说明不在列表里
 import random
+bingo_num = 20      # 要查找的数：20
 
-alist = []
-for i in range(1, 101):
+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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+num=random.choice(alist)
+print(num)
+# 当最低价格索引，小于等于最高价格时
+def rc(num_list,bingo_num):
+    low = 0
+    high = len(num_list)-1
+    while low <= high:
+        
+        mid = (low+high) // 2 #取中间价格的索引位置   //取整
+        guess_num = num_list[mid]   # 猜测的数值
+        if guess_num == bingo_num:
+            print("找到了，它在列表里的索引是：", mid)
+            break
+        elif guess_num < bingo_num:
+            low = mid+1
+        elif guess_num > bingo_num:
+            high = mid-1
+    return None
+rc(alist,num)
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