如果不使用内置的 hex
和 int
函数来实现十六进制和整数之间的转换,可以手动进行转换计算。以下是一个简单的示例,展示如何实现这种转换:
- 整数转换为十六进制字符串:
def int_to_hex(num):
hex_chars = "0123456789abcdef"
hex_string = ""
while num > 0:
remainder = num % 16
hex_string = hex_chars[remainder] + hex_string
num = num // 16
if hex_string == "":
hex_string = "0"
return "0x" + hex_string
num = 255
hex_string = int_to_hex(num)
print(hex_string) # 输出 '0xff'
- 十六进制字符串转换为整数:
import sys
def hex_to_int(hex_string):
hex_string = hex_string[0].lower()
hex_chars = "0123456789abcdef"
result = 0
for char in hex_string[2:]: # 从第三个字符开始,跳过 '0x'
result = result * 16 + hex_chars.index(char)
return result
for line in sys.stdin:
a = line.split()
print(hex_to_int(a))
def hex_to_int(hex_string):
hex_chars = "0123456789abcdef"
result = 0
for char in hex_string[2:]: # 从第三个字符开始,跳过 '0x'
result = result * 16 + hex_chars.index(char)
return result
hex_string = '0xff'
num = hex_to_int(hex_string)
print(num) # 输出 255
通过这种手动实现的方式,你可以完成十六进制和整数之间的相互转换,而不依赖于内置函数。