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
 num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
 num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
-num = 9
+num = 20
 low = 0
 low = 0
 high = len(num_list)-1
 high = len(num_list)-1
 while high >= low:
 while high >= low:
     mid = (low+high)//2
     mid = (low+high)//2
     guess_num = num_list[mid]
     guess_num = num_list[mid]
     if guess_num == num:
     if guess_num == num:
-        print('找到啦')
+        print('找到啦,它的索引是',mid)
         break
         break
     else:
     else:
         if guess_num < num:
         if guess_num < num: