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]
-low=0
-high=len(num_list)-1
-bingo_num=9
-while low<=high
+import random
+alist[]
+for i in random(1,101):
+    alist.append(i)
+num=random.choice(alist)
+def binary_search(alist,num):
+    low=0
+    high=len(alist)-1
+    bingo_num=9
+    while low<=high
         mid=(low+high)//2
         mid=(low+high)//2
         guess_num==num_list[mid]
         guess_num==num_list[mid]
         if guess_num=bingo_num:
         if guess_num=bingo_num:
@@ -13,5 +18,6 @@ while low<=high
             low=mid+1
             low=mid+1
         else guess_num>bingo_num:
         else guess_num>bingo_num:
             high=mid-1
             high=mid-1
+        return None
     
     
         
         
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