您可以搜索 ASCII ASCII 码表 ASCII 码表查询 找到该工具
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ASCII码的取值范围是0~127，可以用7个bit表示。C语言中char型变量的大小规定为一字节，如果存放ASCII码则只用到低7位，高位为0。
| 十进制 | 二进制 | 八进制 | 十六进制 | 字符 |
|---|---|---|---|---|
| 0 | 0 | 00 | 0x0 | NUL (Null char.) |
| 1 | 1 | 01 | 0x1 | SOH (Start of Header) |
| 2 | 10 | 02 | 0x2 | STX (Start of Text) |
| 3 | 11 | 03 | 0x3 | ETX (End of Text) |
| 4 | 100 | 04 | 0x4 | EOT (End of Transmission) |
| 5 | 101 | 05 | 0x5 | ENQ (Enquiry) |
| 6 | 110 | 06 | 0x6 | ACK (Acknowledgment) |
| 7 | 111 | 07 | 0x7 | BEL (Bell) |
| 8 | 1000 | 010 | 0x8 | BS (Backspace) |
| 9 | 1001 | 011 | 0x9 | HT (Horizontal Tab) |
| 10 | 1010 | 012 | 0xa | LF (Line Feed) |
| 11 | 1011 | 013 | 0xb | VT (Vertical Tab) |
| 12 | 1100 | 014 | 0xc | FF (Form Feed) |
| 13 | 1101 | 015 | 0xd | CR (Carriage Return) |
| 14 | 1110 | 016 | 0xe | SO (Shift Out) |
| 15 | 1111 | 017 | 0xf | SI (Shift In) |
| 16 | 10000 | 020 | 0x10 | DLE (Data Link Escape) |
| 17 | 10001 | 021 | 0x11 | DC1 (XON) (Device Control 1) |
| 18 | 10010 | 022 | 0x12 | DC2 (Device Control 2) |
| 19 | 10011 | 023 | 0x13 | DC3 (XOFF)(Device Control 3) |
| 20 | 10100 | 024 | 0x14 | DC4 (Device Control 4) |
| 21 | 10101 | 025 | 0x15 | NAK (Negative Acknowledgement) |
| 22 | 10110 | 026 | 0x16 | SYN (Synchronous Idle) |
| 23 | 10111 | 027 | 0x17 | ETB (End of Trans. Block) |
| 24 | 11000 | 030 | 0x18 | CAN (Cancel) |
| 25 | 11001 | 031 | 0x19 | EM (End of Medium) |
| 26 | 11010 | 032 | 0x1a | SUB (Substitute) |
| 27 | 11011 | 033 | 0x1b | ESC (Escape) |
| 28 | 11100 | 034 | 0x1c | FS (File Separator) |
| 29 | 11101 | 035 | 0x1d | GS (Group Separator) |
| 30 | 11110 | 036 | 0x1e | RS (Request to Send)(Record Separator) |
| 31 | 11111 | 037 | 0x1f | US (Unit Separator) |
| 32 | 100000 | 040 | 0x20 | SP (Space) |
| 33 | 100001 | 041 | 0x21 | ! (exclamation mark) |
| 34 | 100010 | 042 | 0x22 | “ (double quote) |
| 35 | 100011 | 043 | 0x23 | # (number sign) |
| 36 | 100100 | 044 | 0x24 | $ (dollar sign) |
| 37 | 100101 | 045 | 0x25 | % (percent) |
| 38 | 100110 | 046 | 0x26 | & (ampersand) |
| 39 | 100111 | 047 | 0x27 | ‘ (single quote) |
| 40 | 101000 | 050 | 0x28 | ( (left/opening parenthesis) |
| 41 | 101001 | 051 | 0x29 | ) (right/closing parenthesis) |
| 42 | 101010 | 052 | 0x2a | * (asterisk) |
| 43 | 101011 | 053 | 0x2b | + (plus) |
| 44 | 101100 | 054 | 0x2c | , (comma) |
| 45 | 101101 | 055 | 0x2d | - (minus or dash) |
| 46 | 101110 | 056 | 0x2e | . (dot) |
| 47 | 101111 | 057 | 0x2f | / (forward slash) |
| 48 | 110000 | 060 | 0x30 | 0 |
| 49 | 110001 | 061 | 0x31 | 1 |
| 50 | 110010 | 062 | 0x32 | 2 |
| 51 | 110011 | 063 | 0x33 | 3 |
| 52 | 110100 | 064 | 0x34 | 4 |
| 53 | 110101 | 065 | 0x35 | 5 |
| 54 | 110110 | 066 | 0x36 | 6 |
| 55 | 110111 | 067 | 0x37 | 7 |
| 56 | 111000 | 070 | 0x38 | 8 |
| 57 | 111001 | 071 | 0x39 | 9 |
| 58 | 111010 | 072 | 0x3a | : (colon) |
| 59 | 111011 | 073 | 0x3b | ; (semi-colon) |
| 60 | 111100 | 074 | 0x3c | < (less than) |
| 61 | 111101 | 075 | 0x3d | = (equal sign) |
| 62 | 111110 | 076 | 0x3e | > (greater than) |
| 63 | 111111 | 077 | 0x3f | ? (question mark) |
| 64 | 1000000 | 0100 | 0x40 | @ (AT symbol) |
| 65 | 1000001 | 0101 | 0x41 | A |
| 66 | 1000010 | 0102 | 0x42 | B |
| 67 | 1000011 | 0103 | 0x43 | C |
| 68 | 1000100 | 0104 | 0x44 | D |
| 69 | 1000101 | 0105 | 0x45 | E |
| 70 | 1000110 | 0106 | 0x46 | F |
| 71 | 1000111 | 0107 | 0x47 | G |
| 72 | 1001000 | 0110 | 0x48 | H |
| 73 | 1001001 | 0111 | 0x49 | I |
| 74 | 1001010 | 0112 | 0x4a | J |
| 75 | 1001011 | 0113 | 0x4b | K |
| 76 | 1001100 | 0114 | 0x4c | L |
| 77 | 1001101 | 0115 | 0x4d | M |
| 78 | 1001110 | 0116 | 0x4e | N |
| 79 | 1001111 | 0117 | 0x4f | O |
| 80 | 1010000 | 0120 | 0x50 | P |
| 81 | 1010001 | 0121 | 0x51 | Q |
| 82 | 1010010 | 0122 | 0x52 | R |
| 83 | 1010011 | 0123 | 0x53 | S |
| 84 | 1010100 | 0124 | 0x54 | T |
| 85 | 1010101 | 0125 | 0x55 | U |
| 86 | 1010110 | 0126 | 0x56 | V |
| 87 | 1010111 | 0127 | 0x57 | W |
| 88 | 1011000 | 0130 | 0x58 | X |
| 89 | 1011001 | 0131 | 0x59 | Y |
| 90 | 1011010 | 0132 | 0x5a | Z |
| 91 | 1011011 | 0133 | 0x5b | [ (left/opening bracket) |
| 92 | 1011100 | 0134 | 0x5c | \ (back slash) |
| 93 | 1011101 | 0135 | 0x5d | ] (right/closing bracket) |
| 94 | 1011110 | 0136 | 0x5e | ^ (caret/circumflex) |
| 95 | 1011111 | 0137 | 0x5f | _ (underscore) |
| 96 | 1100000 | 0140 | 0x60 | ` |
| 97 | 1100001 | 0141 | 0x61 | a |
| 98 | 1100010 | 0142 | 0x62 | b |
| 99 | 1100011 | 0143 | 0x63 | c |
| 100 | 1100100 | 0144 | 0x64 | d |
| 101 | 1100101 | 0145 | 0x65 | e |
| 102 | 1100110 | 0146 | 0x66 | f |
| 103 | 1100111 | 0147 | 0x67 | g |
| 104 | 1101000 | 0150 | 0x68 | h |
| 105 | 1101001 | 0151 | 0x69 | i |
| 106 | 1101010 | 0152 | 0x6a | j |
| 107 | 1101011 | 0153 | 0x6b | k |
| 108 | 1101100 | 0154 | 0x6c | l |
| 109 | 1101101 | 0155 | 0x6d | m |
| 110 | 1101110 | 0156 | 0x6e | n |
| 111 | 1101111 | 0157 | 0x6f | o |
| 112 | 1110000 | 0160 | 0x70 | p |
| 113 | 1110001 | 0161 | 0x71 | q |
| 114 | 1110010 | 0162 | 0x72 | r |
| 115 | 1110011 | 0163 | 0x73 | s |
| 116 | 1110100 | 0164 | 0x74 | t |
| 117 | 1110101 | 0165 | 0x75 | u |
| 118 | 1110110 | 0166 | 0x76 | v |
| 119 | 1110111 | 0167 | 0x77 | w |
| 120 | 1111000 | 0170 | 0x78 | x |
| 121 | 1111001 | 0171 | 0x79 | y |
| 122 | 1111010 | 0172 | 0x7a | z |
| 123 | 1111011 | 0173 | 0x7b | { (left/opening brace) |
| 124 | 1111100 | 0174 | 0x7c | | (vertical bar) |
| 125 | 1111101 | 0175 | 0x7d | } (right/closing brace) |
| 126 | 1111110 | 0176 | 0x7e | ~ (tilde) |
| 127 | 1111111 | 0177 | 0x7f | DEL (delete) |