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
+num_lis= [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
+def binary_search(num_list,num):
+    low=0
+    high=len(num_list)-1
+    while high >= low:
+        mid=(low+high)//2
+        guess=num_list[mid]
+        if guess==num:
+            return mid
+        elif guess < num:
+            low=mid+1
+        else:
+            high=mid-1
+    return "没找到"
+print(binary_search(num_lis,7))