save project

my_search.py

-import random
+#import random
 
 
-alist = []
-for i in range(1, 101):
-    alist.append(i)
-num = random.choice(alist)
+#alist = []
+#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
 # 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):
+#def binary_search(alist,num):
\ No newline at end of file
+# 使用二分查找法，找出9和20在列表里面的索引
+bingo_num = 17
+num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
+low =0
+high = len(num_list)-1
+while low<= high:
+    mid = (low + high) //2
+    guess = num_list[mid]
+    if guess == bingo_num:
+        print("找到了,他的索是：",mid)
+        break
+    elif guess < bingo_num:
+        low = mid+1
+    else:
+        high = mid-1
\ No newline at end of file