ASCII码对照表
ASCII码对照表
总结一下:
就记三个数字: 0,a,A
0 : 30 ,0-9: 30 -39
a : 97 , a-z: 97-122
A : 65 , A-Z:65-90
要想把一个小写字母变成大写字母,就减去32
char op = 'a';
op -= 32;
//此时op就从a变为A了
想把一个大写字母变成小写字母,同理,就加上32
char op;
op = 'A';
op += 32;
//此时op就从A变成a了
| 二进制 | 十进制 | 十六进制 | 字符/缩写 | 解释 |
|---|---|---|---|---|
| 00110000 | 48 | 30 | 0 | |
| 00110001 | 49 | 31 | 1 | |
| 00110010 | 50 | 32 | 2 | |
| 00110011 | 51 | 33 | 3 | |
| 00110100 | 52 | 34 | 4 | |
| 00110101 | 53 | 35 | 5 | |
| 00110110 | 54 | 36 | 6 | |
| 00110111 | 55 | 37 | 7 | |
| 00111000 | 56 | 38 | 8 | |
| 00111001 | 57 | 39 | 9 | |
| 01000001 | 65 | 41 | A | |
| 01000010 | 66 | 42 | B | |
| 01000011 | 67 | 43 | C | |
| 01000100 | 68 | 44 | D | |
| 01000101 | 69 | 45 | E | |
| 01000110 | 70 | 46 | F | |
| 01000111 | 71 | 47 | G | |
| 01001000 | 72 | 48 | H | |
| 01001001 | 73 | 49 | I | |
| 01001010 | 74 | 4A | J | |
| 01001011 | 75 | 4B | K | |
| 01001100 | 76 | 4C | L | |
| 01001101 | 77 | 4D | M | |
| 01001110 | 78 | 4E | N | |
| 01001111 | 79 | 4F | O | |
| 01010000 | 80 | 50 | P | |
| 01010001 | 81 | 51 | Q | |
| 01010010 | 82 | 52 | R | |
| 01010011 | 83 | 53 | S | |
| 01010100 | 84 | 54 | T | |
| 01010101 | 85 | 55 | U | |
| 01010110 | 86 | 56 | V | |
| 01010111 | 87 | 57 | W | |
| 01011000 | 88 | 58 | X | |
| 01011001 | 89 | 59 | Y | |
| 01011010 | 90 | 5A | Z | |
| 01100001 | 97 | 61 | a | |
| 01100010 | 98 | 62 | b | |
| 01100011 | 99 | 63 | c | |
| 01100100 | 100 | 64 | d | |
| 01100101 | 101 | 65 | e | |
| 01100110 | 102 | 66 | f | |
| 01100111 | 103 | 67 | g | |
| 01101000 | 104 | 68 | h | |
| 01101001 | 105 | 69 | i | |
| 01101010 | 106 | 6A | j | |
| 01101011 | 107 | 6B | k | |
| 01101100 | 108 | 6C | l | |
| 01101101 | 109 | 6D | m | |
| 01101110 | 110 | 6E | n | |
| 01101111 | 111 | 6F | o | |
| 01110000 | 112 | 70 | p | |
| 01110001 | 113 | 71 | q | |
| 01110010 | 114 | 72 | r | |
| 01110011 | 115 | 73 | s | |
| 01110100 | 116 | 74 | t | |
| 01110101 | 117 | 75 | u | |
| 01110110 | 118 | 76 | v | |
| 01110111 | 119 | 77 | w | |
| 01111000 | 120 | 78 | x | |
| 01111001 | 121 | 79 | y | |
| 01111010 | 122 | 7A | z | |
ASCII码值好多地方都会用到,每次用都要查,😒

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