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]
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+num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
+num=9
+low=0
+high=len(num_list)-1
+while=low<=high:
+    mid=(low+high)//2
+    guess=num_list[mid]
+    if guess==num:
+        print("找到了，它的索引是：")
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q.py

+def star(n):
+    if n== 0:
+        print("")
+        return
+    print("*" * n)
+    star(n-1)
+star(140)
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