From 5354d6387b357f559ebb324bfa8fe9c12283a767 Mon Sep 17 00:00:00 2001
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Date: Tue, 21 Apr 2026 11:27:37 +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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---
 XWL.py | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 XWL.py

diff --git a/XWL.py b/XWL.py
new file mode 100644
index 0000000..c907fc8
--- /dev/null
+++ b/XWL.py
@@ -0,0 +1,34 @@
+print(" 题目1")
+s = "Hello"
+for c in s:
+    print(f"'{c}' 的ASCII码: {ord(c)}")
+print(f"ASCII码65对应的字符: {chr(65)}")
+import math
+print("题目3 ")
+A = [3, 4]
+B = [1, 2]
+A_plus_B = [A[0] + B[0], A[1] + B[1]]
+print("A + B =", A_plus_B)
+two_times_A = [2 * A[0], 2 * A[1]]
+print("2 × A =", two_times_A)
+A_norm = math.sqrt(A[0] ** 2 + A[1] ** 2)
+print("A 的模 =", A_norm)
+print(" 题目4 ")
+A = [1, 2, 3]
+B = [4, 5, 6]
+dot_product = sum(a * b for a, b in zip(A, B))
+print("A·B =", dot_product)
+def vector_norm(v):
+    return math.sqrt(sum(x ** 2 for x in v))
+norm_A = vector_norm(A)
+norm_B = vector_norm(B)
+cos_sim = dot_product / (norm_A * norm_B)
+print("余弦相似度 =", cos_sim)
+A_new = [1, 0]
+B_new = [0, 1]
+dot_product_new = sum(a * b for a, b in zip(A_new, B_new))
+norm_A_new = vector_norm(A_new)
+norm_B_new = vector_norm(B_new)
+cos_sim_new = dot_product_new / (norm_A_new * norm_B_new)
+print("A=[1,0], B=[0,1] 的余弦相似度 =", cos_sim_new)
+print("原因：两个向量正交,点积为0,因此余弦相似度为0")
\ No newline at end of file