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]
+a=[1,2,3,4,5,6,7,9,10,11,14,19,20,99,108]
+low=0
\ No newline at end of file
+high=len(a)
+num=int(input('你想要查找那个数字'))
+while True :
+    mid=(high+low)//2
+    guess=a[mid-1]
+    if guess==num:
+        print('🆗了，索引是',mid)
+        break
+    elif guess>num:
+        high=mid-1
+    elif guess<num:
+        low=mid+1
+    else:
+        print('没有')
+        break
\ No newline at end of file