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golang printf escape

May 06, 2023 pm 02:28 PM

当我们在使用Golang中的printf函数时,有时我们需要在输出字符串中使用一些特殊字符,如引号、反斜杠、制表符等。在这种情况下,我们可能需要使用转义字符来表示这些特殊字符,以确保它们被正确地显示在输出字符串中。

在Golang中,printf函数中的转义字符以“\”开头,它们用来表示一些预定义的特殊字符或者是一些特殊的二进制值,如下表所示:

转义字符 描述
\a 响铃声(ASCII码值07)
\b 退格符(ASCII码值08),将当前位置移到前一列
\f 换页符(ASCII码值12),将当前位置移到下一页开头
\n 换行符(ASCII码值10),将当前位置移到下一行开头
\r 回车符(ASCII码值13),将当前位置移到本行开头
\t 水平制表符(ASCII码值09),将当前位置移到下一个水平制表符位置上,如果没有则移动到下一行
\v 垂直制表符(ASCII码值11),将当前位置移到下一个垂直制表符位置上,如果没有则换到下一行
\ 反斜杠
\' 单引号
\" 双引号
\xhh 以十六进制值hh表示的一个字符
\ooo 以八进制值ooo表示的一个字符
\uhhhh 以十六进制值hhhh表示的Unicode字符
\Uhhhhhh 以十六进制值hhhhhh表示的Unicode字符

在使用转义字符时,我们只需要在需要转义的字符前加上“\”即可。例如,如果我们需要在输出字符串中显示一个双引号,我们可以使用“\"”来代替转义后的双引号,如下所示:

fmt.Printf("Hello, \"Golang\"!") // 输出结果:Hello, "Golang"!
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如果我们需要在输出字符串中显示一个反斜杠,我们可以使用“\”来代替转义后的反斜杠,如下所示:

fmt.Printf("C:\\Windows\\System32\\") // 输出结果:C:\Windows\System32\
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当我们需要在输出字符串中显示一些特殊字符时,我们应该注意使用转义字符来表示这些特殊字符。这样可以确保我们的输出结果是正确的,并且可以避免一些潜在的错误。

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