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
+guess_zhao=int(input("shuru"))
+low=0
+haight=len(num_list)-1
+while low<=haight:
+    mid=(low+haight)//2
+    gusse_cai=num_list[mid]
+    if gusse_cai==guess_zhao:
+        print(mid)
+        print("结束")
+        break
+    elif gusse_cai>guess_zhao:
+        haight=mid-1
+    elif gusse_cai<guess_zhao:
+        low=mid+1
+    if low>haight:
+        print("没有这个数")