C/C++转义字符表
| 转义字符 | 意义 | ASCII码值（十进制） |
| \a | 响铃(BEL) | 007 |
| \b | 退格(BS) ，将当前位置移到前一列 | 008 |
| \f | 换页(FF)，将当前位置移到下页开头 | 012 |
| \n | 换行(LF) ，将当前位置移到下一行开头 | 010 |
| \r | 回车(CR) ，将当前位置移到本行开头 | 013 |
| \t | 水平制表(HT) （跳到下一个TAB位置） | 009 |
| \v | 垂直制表(VT) | 011 |
| \\ | 代表一个反斜线字符''\' | 092 |
| \' | 代表一个单引号（撇号）字符 | 039 |
| \" | 代表一个双引号字符 | 034 |
| \? | 代表一个问号 | 063 |
| \0 | 空字符(NULL) | 000 |
| \ddd | 1到3位八进制数所代表的任意字符 | 三位八进制 |
| \xhh | 1到2位十六进制所代表的任意字符 | 二位十六进制 |
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