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
-num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
\ No newline at end of file
+import=[]
+for i inrange(1,101):
+    alist.append(i)
+num=random.choice(alist)
+def dinary_search(alist,num)
+    low=0
+    high=len(alist)-1
+    while iow<high:
+        mid=(low+high)//2
+        guess=alist[mid]
+        if guess==num:
+            return mid
+        elif guess<num:
+            low=mid+1
+        else:
+            high=mid-1
+    return None
+result=binary_search(alist,num)
+print("老师给的数字是",num)
+print("它在列表里的索引是"，result)