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]
\ No newline at end of file
+high=len(num_list)-1
+low=0
+num_1=input(':')
+num=int(num_1)
+mid=0
+while not high<low:
+    mid=(high+low)//2
+    guess=num_list[mid]
+    if guess==num:
+        print('找到了'+str(mid))
+        exit()
+    elif guess>num:
+        high=mid-1
+    else:
+        low=mid+1
+print('没找到')
+    
\ No newline at end of file