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]
+low=0
+high=len(num_list)-1
+mid=(low+high)//2
+guess=20
+while high<=low:
+    if guess==20:
+        print("猜到了")
+    elif guess<20:
+        low=mid+1
+    elif guess>20:
+        high=mid-1
+
+        
+