diff --git a/cxy.py b/cxy.py
new file mode 100644
index 0000000..12fd740
--- /dev/null
+++ b/cxy.py
@@ -0,0 +1,31 @@
+#第一题
+str1 = "Hello"
+str2 = 'Hello'
+
+print("双引号表示：", str1)
+print("单引号表示：", str2)
+print("两种表示方式是否相同：", str1 == str2)
+
+print("\n--- Hello 每个字符的 ASCII 码 ---")
+for char in "Hello":
+    print(f"字符 {char} 的ASCII码：{ord(char)}")
+
+print("\n--- chr() 函数验证 ---")
+result = chr(65)
+print(f"数字65通过chr()转换后是：{result}")
+print(f"65对应字符是否为大写A：{result == 'A'}")
+
+#第二题
+import math
+
+A = [3, 4]
+B = [1, 2]
+
+add_result = [A[0] + B[0], A[1] + B[1]]
+print("A + B =", add_result)
+
+mul_result = [2 * A[0], 2 * A[1]]
+print("2 × A =", mul_result)
+
+norm_A = math.sqrt(A[0]**2 + A[1]**2)
+print("A 的模 =", norm_A)
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