82 lines
2.1 KiB
Python
82 lines
2.1 KiB
Python
s = "Hello"
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for char in s:
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print(f"'{char}' 的ASCII码: {ord(char)}")
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print(f"ASCII码65对应的字符: {chr(65)}")
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import math
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# 定义向量
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A = [3, 4]
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B = [1, 2]
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# 1. 计算 A + B（对应元素相加）
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A_plus_B = [A[0] + B[0], A[1] + B[1]]
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print("=== 题目3 计算结果 ===")
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print(f"1. A + B = {A_plus_B}")
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# 2. 计算 2 × A（数乘向量，每个元素乘系数）
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two_times_A = [2 * A[0], 2 * A[1]]
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print(f"2. 2 × A = {two_times_A}")
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# 3. 计算 A 的长度（模），公式：||A|| = √(x² + y²)
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A_norm = math.sqrt(A[0] ** 2 + A[1] ** 2)
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print(f"3. A 的长度（模） = {A_norm}")
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import math
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# 定义向量
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A = [3, 4]
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B = [1, 2]
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# 1. 计算 A + B（对应元素相加）
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A_plus_B = [A[0] + B[0], A[1] + B[1]]
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print("=== 题目3 计算结果 ===")
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print(f"1. A + B = {A_plus_B}")
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# 2. 计算 2 × A（数乘向量，每个元素乘系数）
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two_times_A = [2 * A[0], 2 * A[1]]
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print(f"2. 2 × A = {two_times_A}")
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# 3. 计算 A 的长度（模），公式：||A|| = √(x² + y²)
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A_norm = math.sqrt(A[0] ** 2 + A[1] ** 2)
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print(f"3. A 的长度（模） = {A_norm}")
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# 题目1
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print("=== 题目1 ===")
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s = "Hello"
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for char in s:
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print(f"'{char}' 的ASCII码: {ord(char)}")
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print(f"ASCII码65对应的字符: {chr(65)}")
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# 题目3
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print("\n=== 题目3 ===")
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A = [3, 4]
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B = [1, 2]
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# 1. A+B
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A_plus_B = [A[0]+B[0], A[1]+B[1]]
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print(f"A + B = {A_plus_B}")
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# 2. 2*A
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two_A = [2*A[0], 2*A[1]]
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print(f"2 * A = {two_A}")
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# 3. A的模
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import math
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A_norm = math.sqrt(A[0]**2 + A[1]**2)
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print(f"A的长度(模) = {A_norm}")
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# 题目4
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print("\n=== 题目4 ===")
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A = [1, 2, 3]
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B = [4, 5, 6]
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# 1. 点积
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dot_product = sum(a*b for a,b in zip(A,B))
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print(f"A·B = {dot_product}")
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# 2. 余弦相似度
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A_norm = math.sqrt(sum(a**2 for a in A))
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B_norm = math.sqrt(sum(b**2 for b in B))
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cos_sim = dot_product / (A_norm * B_norm)
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print(f"余弦相似度 = {cos_sim:.4f}")
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# 3. A=[0,1], B=[0,1]的余弦相似度
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A2 = [0, 1]
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B2 = [0, 1]
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dot_product2 = sum(a*b for a,b in zip(A2,B2))
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A2_norm = math.sqrt(sum(a**2 for a in A2))
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B2_norm = math.sqrt(sum(b**2 for b in B2))
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cos_sim2 = dot_product2 / (A2_norm * B2_norm)
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print(f"A=[0,1], B=[0,1]的余弦相似度 = {cos_sim2}") |