save project

binary_search.py

 # 使用二分查找法，找出9和20在列表里面的索引
 num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
+mid=（low+high）
+guess =num_list[mid]
+if guess ==num：
+   print("找到了")
+elif guess < num:
+    low=mid+1
+    else:
+        high=mid-1
\ No newline at end of file