save project

my_search.py

-import random
-
-alist = []
-for i in range(1, 101):
-    alist.append(i)
-num = random.choice(alist)
-# 请完善二分查找函数binary_search(),查找出num在列表alist里面的索引位置
-
+def sum_numbers(num):
+    if num == 1
+        return 1
+    tempb = sum_numbers(num-1)
+    return num +temp
+result = sum_numbers(100)
+print(result)
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-def binary_search(alist,num):
-    low=0                           
-    high=len(alist)-1
-    while low<=high:
-        mid=(low+high)//2
-        guess=alist[mid]
-        if guess==num:
-            return mid
-        elif guess<num:
-            low=mid+1
-        else:
-            low=mid-1
-    return None
-result=binary_search(alist,num)
-print("老师给的数是：",num)
-print("它在列表里的索引是",result)
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