输入一段字符（0123456789ABCDEF）中间可有空格，可无，就能计算异或的运算了， 主要用在校验和上，对调试硬件协议有用处-Enter a character (0123456789ABCDEF) may have spaces between, may be, we can calculate XOR computing, mainly used in the checksum on the agreement have the use of hardware debugging