# 题目1 在Python中，用两种方式表示"Hello"：
# 1.用 ord() 函数打印每个字符的ASCII码
text = "Hello"
for char in text:
    print(f"'{char}'的ASCII码是:{ord(char)}")

# 2.用 chr() 函数验证：字符65对应的是大写字母A
char_65 = chr(65)
print(f"ASCII码65对应的字符是:{cahr_65}")
print(f"验证结果:{char_65 == 'A'}")



# 题目3
# 1.计算 A + B 的结果:
A = [3,4]
B = [1,2]
A_plus_B = [a + b for a,b in zip(A,B)]
print(f"A + B = {A_plus_B}")

# 2.计算 2 × A 的结果:
scalar = 2
two_A = [scalar * a for a in A]
print(f"2 * A = {two_A}")

# 3.计算 A 的长度（模）:
import math
A_magnitutude = math.sqrt(sum(a**2 for a in A))
print(f"A的长度(模)是:{A_magnitutude}")


# 题目4
# 1.计算它们的点积 A · B:
A = [1,2,3]
B = [4,5,6]
dot_product = sum(a * b for a,b in zip(A,B))
print(f"A * B ={dot_product}")

# 2.计算它们的余弦相似度:
import math
A = [1,2,3]
B = [4,5,6]
dot_product = sum(a * b for a,b in )