import struct
def ascii_to_signed_binary(char):
# 将ASCII字符转换为ASCII码值
ascii_val = ord(char)
# 将ASCII码值转换为二进制字符串
binary_str = bin(ascii_val)[2:].zfill(8)
# 转换为有符号的二进制字符串
signed_binary_str = '1' + binary_str[1:] if binary_str[0] == '1' else '0' + binary_str[1:]
# 将有符号的二进制字符串转换为两个字节的有符号二进制数
signed_binary = struct.pack('>h', int(signed_binary_str, 2))
return signed_binary
# 测试代码
print(ascii_to_signed_binary('A')) # b'\x41\x00'
print(ascii_to_signed_binary('z')) # b'z\x00\x00'
print(ascii_to_signed_binary('$')) # b'\xfc\x00'
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