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
 # 使用二分查找法，找出9和20在列表里面的索引
+binggo_num=1
 num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
 num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
+low=0
+high=len(num_list)-1
+
+while low <=high:
+    mid=(low+high)//2
+    guess_num=num_list[mid]
+    if guess_num==binggo_num:
+        print("找到了，它的索引是：",mid)
+        break
+    elif guess_num<binggo_num:
+        low=mid+1
+    elif guess_num>binggo_num:
+        high=mid-1
\ No newline at end of file