save project

my_search.py

@@ -5,5 +5,23 @@ for i in range(1, 101):
     alist.append(i)
 num = random.choice(alist)
 # 请完善二分查找函数binary_search(),查找出num在列表alist里面的索引位置
-
-def binary_search(alist,num):
\ No newline at end of file
+def f1(alist,num):
+    # 使用二分查找法，找出9和20在列表里面的索引
+    nh=0
+    min=0
+    max=len(alist)-1
+    while min<=max:
+        mid=(min+max)//2
+        ges=alist[mid]
+        if ges==num:
+            print('ohhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh')
+            print('第',mid,'位')
+            nh=1
+            break
+        if ges>num:
+            max=mid-1
+        if ges<num:
+            min=mid+1
+    if nh==0:
+        print('noooooooooooooooooooooooooooooooooooooooooooooooo')
+f1(alist,num)
\ No newline at end of file