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
-bingo_num = 20
-num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
-low = 0
-high = len(num_list)-1
-while low <=high:
+
+import random
+alist=[]
+for i in range(1,101):
+    alist.append(i)
+num = random.choice(alist)
+def binary_search(alist,num):
+    low = 0
+    high = len(num_list)-1
+    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:
-        print("")
-        break
-    elif guess_num<bingo_num:
+        if guess == num:
+            return mid
+        elif guess < num
         low = mid+1
         low = mid+1
-    elif guess_num >bingo_num:
+    elif :
         high = mid-1
         high = mid-1
+    return None
+result = binary_search(ali)
\ No newline at end of file