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]
+import random
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+alist = []
+for i in range(1,101):
+    alist.append(i)
+num = random.choice(alist)
+
+def binary_search(alist,num):
+    low = 0
+    hight=len(alist)-1
+    while low <=hight:
+        mid=len(num_list)//2
+        mid = (low+hight)
+        guess=alist[mid]
+        if guess==num:
+            return mid
+            
+        elif guess<num:
+            low = mid+1
+        else:
+            hight=mid-1
+    return None
+return = binary_search((alist,num))
+print(num)
+print(result)
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