完成作业

Yy.py

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+s = "Hello"
+for char in s:
+    print(f"'{char}' 的ASCII码: {ord(char)}")
+    print(f"ASCII码65对应的字符: {chr(65)}")
+import math
+
+# 题目3
+A = [3, 4]
+B = [1, 2]
+# 1. A+B
+A_plus_B = [A[0]+B[0], A[1]+B[1]]
+# 2. 2*A
+two_A = [2*A[0], 2*A[1]]
+# 3. A的模
+norm_A = math.sqrt(A[0]**2 + A[1]**2)
+print("题目3结果：")
+print(f"A+B = {A_plus_B}")
+print(f"2*A = {two_A}")
+print(f"A的模 = {norm_A}")
+
+# 题目4
+A = [1, 2, 3]
+B = [4, 5, 6]
+# 1. 点积
+dot_product = sum(a*b for a,b in zip(A,B))
+# 2. 余弦相似度
+norm_A = math.sqrt(sum(a**2 for a in A))
+norm_B = math.sqrt(sum(b**2 for b in B))
+cos_sim = dot_product / (norm_A * norm_B)
+print("\n题目4-1、2结果：")
+print(f"点积 = {dot_product}")
+print(f"余弦相似度 = {cos_sim:.4f}")
+
+# 题目4-3
+A2 = [1, 0]
+B2 = [0, 1]
+dot_product2 = sum(a*b for a,b in zip(A2,B2))
+norm_A2 = math.sqrt(sum(a**2 for a in A2))
+norm_B2 = math.sqrt(sum(b**2 for b in B2))
+cos_sim2 = dot_product2 / (norm_A2 * norm_B2)
+print("\n题目4-3结果：")
+print(f"余弦相似度 = {cos_sim2}")