乳胶打印单斜杠、反斜杠r、反斜杠n

我希望 *.tex 文件中的以下行“按原样”打印：

while (tmp[0] == '\r' || tmp[0] == '\n') {tmp++;}

当我将它包装在 \verb 命令中时，如下所示：

\verb"while (tmp[0] == '\r' || tmp[0] == '\n') {tmp++;}"

它不起作用，我得到：

! Undefined control sequence.

所有其他谷歌答案都是so复杂的。

当然，必须有一个简单的方法来做到这一点，对吗？ 谢谢！

EDIT:

这是评论中要求的最小计数器示例：

%%%%%%%%%%%%%%%%%%%%%%%%%%
% document class: beamer %
%%%%%%%%%%%%%%%%%%%%%%%%%%
\documentclass{beamer}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% no navigation bars please %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\setbeamertemplate{footline}[frame number]{}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% no navigation symbols please %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\setbeamertemplate{navigation symbols}{}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% no footers at all please %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\setbeamertemplate{footline}{}

%%%%%%%%%%%%%%%%%%%%%%%%%%%
% center the title please %
%%%%%%%%%%%%%%%%%%%%%%%%%%%
\setbeamertemplate{frametitle}[default][center]

%%%%%%%%%%%%%%%%%%
% begin document %
%%%%%%%%%%%%%%%%%%
\begin{document}

%%%%%%%%%
% title %
%%%%%%%%%
\title{Some Title}   

%%%%%%%%%%
% author %
%%%%%%%%%%
\author{Some Author}

%%%%%%%%%%%%
% date ... %
%%%%%%%%%%%%
\date{\today} 

%%%%%%%%%%%%%
% frame ... %
%%%%%%%%%%%%%
\frame{\titlepage} 

%%%%%%%%%%%%%%%%%%%%%%%%%%%
% SECTION :: Introduction %
%%%%%%%%%%%%%%%%%%%%%%%%%%%
\section{Section Introduction} 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Frame Title :: Introduction %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\frame{\frametitle{Status}
%%%%%%%%%%%%%%%%%%
% Items :: Begin %
%%%%%%%%%%%%%%%%%%
\begin{itemize}
\item
while (tmp[0] == 'A' $||$ tmp[1] == 'B') $\{$tmp++;$\}$
\end{itemize}
}
\end{document}

要在 LaTeX 中打印实际的反斜杠，您可以使用以下命令\backslash，所以对于你的代码：

while (tmp[0] == '\backslash r' || tmp[0] == '\backslash n') {tmp++;}

EDIT:我忘了你在数学模式下需要这个命令。如果您希望一切“按原样”，那么这就是您需要的代码（也适用于垂直线和大括号）：

while (tmp[0] == `$\backslash$r' $\|$ tmp[0] == `$\backslash$n') $\{$tmp++;$\}$