ASCII表
ASCII表Bin(二进制)Oct(八进制)Dec(十进制)Hex(十六进制)缩写/字符解释0000 00000000x00NUL(null)空字符0000 00010110x01SOH(start of headline)标题开始0000 00100220x02STX (start of text)正文开始0000 00110330x03ETX (end of text)正文结束0000 01000440x04EOT (end of transmission)传输结束0000 01010550