From 0fe67e078d12d4d665a27c225602106cd36a5cdc Mon Sep 17 00:00:00 2001
From: BellCodeEditor <bellcode_dev@bell.ai>
Date: Sat, 20 Apr 2024 09:24:30 +0800
Subject: [PATCH] save project

---
 my_search.py | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/my_search.py b/my_search.py
index 6eaf4dc..dae6275 100644
--- a/my_search.py
+++ b/my_search.py
@@ -6,4 +6,20 @@ for i in range(1, 101):
 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):
\ No newline at end of file
+def binary_search(alist,num):
+    low = 0         # 初始最低索引
+    high = len(alist)-1         # 初始最高索引
+    while low <= high:         # 当最低索引小于等于最高索引
+        mid = (low + high) // 2
+        guess = alist[mid]
+        if guess == num:        # 中间值等于查找对象,返回索引
+            return mid
+        elif guess < num:       # 中间值小于查找对象
+            low = mid + 1
+        else:                   # 中间值大于查找对象
+            high = mid - 1
+    return None
+
+result = binary_search(alise, num)
+print("老师给的数值是:", num)
+print("它在列表里的索引是:", result)   # 列表从1开始,索引从0开始,所以少1
\ No newline at end of file
--
libgit2 0.25.0