#题目1
text="Hello"
print(f"字符串'{text}'中的每个字符的ASCII码如下：")
for ch in text :
    print(f"字符'{char}':{ascii_val}")

#题目3
import math
A=[3,4]
B=[1,2]
A_plus_B=[A[0]+B[0],A[1]+B[1]]
print("1. A+B=",A_plus_B)
two_times_A=[2*A[0],2*A[1]]
print("2. 2*A=",two_times_A)
length_A=math.sqrt(A[0]**2+A[1]**2)
print("3. |A|=",length_A)