ASCII码值32到126之间是可打印的字符，而ASCII码值0到31是控制字符，127是删除字符，它们在表格中没有对应的可见字符文章来源地址https://www.toymoban.com/news/detail-673652.html
| ASCII码值 | 字符 |
|---|---|
| 0 | NUL (空字符) |
| 1 | SOH (标题开始) |
| 2 | STX (正文开始) |
| 3 | ETX (正文结束) |
| 4 | EOT (传输结束) |
| 5 | ENQ (传输结束) |
| 6 | ACK (确认回复) |
| 7 | BEL (响铃) |
| 8 | BS (响铃) |
| 9 | HT (制表符) |
| 10 | LF (换行) |
| 11 | VT (垂直制表符) |
| 12 | FF (换页) |
| 13 | CR (回车) |
| 14 | SO (选择查询) |
| 15 | SI (设备控制1) |
| 16 | DLE (数据链路转义) |
| 17 | DC1 (设备控制2) |
| 18 | DC2 (设备控制3) |
| 19 | DC3 (设备控制4) |
| 20 | DC4 (拒绝接收) |
| 21 | NAK (确认失败回复) |
| 22 | SYN (确认失败回复) |
| 23 | ETB (结束传送块) |
| 24 | CAN (取消) |
| 25 | EM (媒介结束) |
| 26 | SUB (替代) |
| 27 | ESC (逃脱) |
| 28 | FS (分组分隔符) |
| 29 | GS (信息分隔符) |
| 30 | RS (记录分隔符) |
| 31 | US (单元分隔符) |
| 32 | 空格 |
| 33 | ! |
| 34 | " |
| 35 | # |
| 36 | $ |
| 37 | % |
| 38 | & |
| 39 | ' |
| 40 | ( |
| 41 | ) |
| 42 | * |
| 43 | + |
| 44 | , |
| 45 | - |
| 46 | . |
| 47 | / |
| 48 | 0 |
| 49 | 1 |
| 50 | 2 |
| 51 | 3 |
| 52 | 4 |
| 53 | 5 |
| 54 | 6 |
| 55 | 7 |
| 56 | 8 |
| 57 | 9 |
| 58 | : |
| 59 | ; |
| 60 | < |
| 61 | = |
| 62 | > |
| 63 | ? |
| 64 | @ |
| 65 | A |
| 66 | B |
| 67 | C |
| 68 | D |
| 69 | E |
| 70 | F |
| 71 | G |
| 72 | H |
| 73 | I |
| 74 | J |
| 75 | K |
| 76 | L |
| 77 | M |
| 78 | N |
| 79 | O |
| 80 | P |
| 81 | Q |
| 82 | R |
| 83 | S |
| 84 | T |
| 85 | U |
| 86 | V |
| 87 | W |
| 88 | X |
| 89 | Y |
| 90 | Z |
| 91 | [ |
| 92 | \ |
| 93 | ] |
| 94 | ^ |
| 95 | _ |
| 96 | ` |
| 97 | a |
| 98 | b |
| 99 | c |
| 100 | d |
| 101 | e |
| 102 | f |
| 103 | g |
| 104 | h |
| 105 | i |
| 106 | j |
| 107 | k |
| 108 | l |
| 109 | m |
| 110 | n |
| 111 | o |
| 112 | p |
| 113 | q |
| 114 | r |
| 115 | s |
| 116 | t |
| 117 | u |
| 118 | v |
| 119 | w |
| 120 | x |
| 121 | y |
| 122 | z |
| 123 | { |
| 124 | | |
| 125 | } |
| 126 | ~ |
| 127 | DEL |
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