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]
\ No newline at end of file
+abab = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
+low=0
+high=len(abab)-1
+num=int(input("输入："))
+while high>low:
+    mid=(low+high)//2
+    if num==abab[mid]:
+        print("找到了")
+        break
+    elif abab[mid]>num:
+        high=abab[mid]-1
+    else:
+        low=abab[mid]+1
\ No newline at end of file