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]
+a=input("要查找的数")
\ No newline at end of file
+guess=int(a)
+num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
+low=0
+hight=len(num_list)-1
+
+while low<=hight:
+    mid=(hight+low)//2
+    if guess==num_list[mid]:
+        print("OK")
+        print((mid))
+        break
+    elif guess>num_list[mid]:
+        low=mid+1
+    else:
+        hight=mid-1
+        print("没找到")
+        break
+
+
+
+