From a02bdccba798fbaabd083b4070967d373a05a950 Mon Sep 17 00:00:00 2001
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 <2509165043@student.example.com>
Date: Tue, 21 Apr 2026 11:28:19 +0800
Subject: [PATCH] =?UTF-8?q?=E4=B8=8A=E4=BC=A0=E6=96=87=E4=BB=B6=E8=87=B3?=
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---
 260421  43.py | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 260421  43.py

diff --git a/260421  43.py b/260421  43.py
new file mode 100644
index 0000000..1a192d0
--- /dev/null
+++ b/260421  43.py	
@@ -0,0 +1,29 @@
+s="Hello"
+for char in s:
+    print(f"{char}的ASCII码是{ord(char)}")
+
+A=[3,4]
+B=[1,2]
+add_result=[A[i]+B[i]for i in range(len(A))]
+print("题目3-1 A+B结果:",add_result)
+mult_result=[2* x for x in A]
+print("题目3-2 2*A结果：",mult_result)
+import math
+a_length=math.sqrt(sum(x**2 for x in A))
+print("题目3-3 A的长度：",a_length)
+
+A1=[1,2,3]
+B1=[4,5,6]
+dot_product=sum(A1[i]*B1[i]for i in range(len(A1)))
+print("\n题目4-1 点积结果：",dot_product)
+a_len=math.sqrt(sum(x**2 for x in A1))
+b_len=math.sqrt(sum(x**2 for x in B1))
+cos_sim=dot_product/(a_len*b_len)
+print("题目4-2 余弦相似度:",cos_sim)
+A2=[1,0]
+B2=[0,1]
+dot2=sum(A2[i]*B2[i]for i in range(len(A2)))
+a2_len=math.sqrt(sum(x**2 for x in A2))
+b2_len=math.sqrt(sum(x**2 for x in B2))
+cos_sim2=dot2/(a2_len*b2_len)
+print("题目4-3 余弦相似度：",cos_sim2,",原因：两个向量正交（夹角90度)")
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