如何在伪代码中获得直引号？

Question

伪代码中的引号目前如下所示：

我怎样才能获得看起来更像编程环境而不是像我用 MS Word 输入的引文？

平均能量损失

\documentclass{article}
\usepackage[pdftex,active,tightpage]{preview}
\setlength\PreviewBorder{2mm}

\usepackage[utf8]{inputenc} % this is needed for umlauts
\usepackage[ngerman]{babel} % this is needed for umlauts
\usepackage[T1]{fontenc}    % this is needed for correct output of umlauts in pdf
\usepackage{amssymb,amsmath,amsfonts} % nice math rendering
\usepackage{algorithm,algpseudocode}

\begin{document}
\begin{preview}
    This is a 'samle' with some "quotes".

    \begin{algorithm}[H]
        \begin{algorithmic}
            \State $a \gets \Call{map}{~}$
            \State $a['x'] \gets 42$
            \State $a["x"] \gets 1337$
        \end{algorithmic}
    \caption{Algorithmus von Stoer und Wanger}
    \label{alg:seq1}
    \end{algorithm}
\end{preview}
\end{document}

相关问题

在其他一些环境中，该问题已经得到解答：

• 直接引号？：似乎我们可以使用和来获得直引号\textquotedbl，\textquotesingle但我希望在所有算法环境中都获得直引号，而不必在我的伪代码中摆弄
• Consolas：直引号：这是列表
• 如何在列表中获得直双引号？
• 制表符中的直引号

Answer 1

只要使用一些技巧，您就可以获得直引号。

\documentclass{article}

\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[ngerman]{babel}

\usepackage{textcomp}
\usepackage{amssymb,amsmath,amsfonts}
\usepackage{algorithm,algpseudocode}
\usepackage{etoolbox} % for the trick

% setup algorithmic to use straight quotes
\AtBeginEnvironment{algorithmic}{\useupquotes}

% define the command that activates the quotes and redefines them
\newcommand{\useupquotes}{%
  \begingroup\lccode`\~=`\'\lowercase{\endgroup\let~}\algoupquote
  \begingroup\lccode`\~=`\"\lowercase{\endgroup\let~}\algoupquotes
  \catcode`\'=\active\catcode`\"=\active
}

% Customize here (\mbox is necessary because of math mode;
% if needed in subscripts, use \text instead)
\newcommand{\algoupquote}{\mbox{\textquotesingle}}
\newcommand{\algoupquotes}{\mbox{\char`\"}}

\begin{document}
Look at Algorithm~\ref{some} for seeing the quotes.

\begin{algorithm}[htp]
\begin{algorithmic}
\State $a['x'] \gets 42$
\State $a["x"] \gets 1337$
\end{algorithmic}
\caption{Some algorithm}\label{some}
\end{algorithm}
\end{document}

Answer 2

以下是主动角色方法，也使用textcomp。

\documentclass{article}
\usepackage[pdftex,active,tightpage]{preview}
\setlength\PreviewBorder{2mm}

\usepackage[utf8]{inputenc} % this is needed for umlauts
\usepackage[ngerman]{babel} % this is needed for umlauts
\usepackage[T1]{fontenc}    % this is needed for correct output of umlauts in pdf
\usepackage{amssymb,amsmath,amsfonts} % nice math rendering
\usepackage{algorithm,algpseudocode}
\usepackage{textcomp}
\let\svalgorithm\algorithm
\catcode`'=\active
\catcode`"=\active
\def\quoteactive{\catcode`'=\active\def'{\makebox{\textquotesingle}}}
\def\qquoteactive{\catcode`"=\active\def"{\makebox{\textquotedbl}}}
\catcode`'=12
\catcode`"=12
\def\algorithm{\quoteactive\qquoteactive\svalgorithm}

\begin{document}
\begin{preview}
    This is a 'sample' with some "quotes"{} or ``quotes''.

    \begin{algorithm}[H]
        \begin{algorithmic}
            \State $a \gets \Call{map}{~}$
            \State $a['x'] \gets 42$
            \State $a["x"] \gets 1337$
        \end{algorithmic}
    \caption{Algorithmus von Stoer und Wanger}
    \label{alg:seq1}
    \end{algorithm}
Restored? ' and ", ``quotations'' or `quotations'
\end{preview}
\end{document}

Answer 3

您可能可以让引号处于活动状态，但我建议将它们包装在宏中（参考直接引号？)：

\documentclass{article}

\usepackage[utf8]{inputenc} % this is needed for umlauts
\usepackage[ngerman]{babel} % this is needed for umlauts
\usepackage[T1]{fontenc}    % this is needed for correct output of umlauts in pdf
\usepackage{textcomp}
\usepackage{amssymb,amsmath,amsfonts} % nice math rendering
\usepackage{algorithm,algpseudocode}

\makeatletter
\newcommand{\upquotetype}{}
\newcommand{\upquote@aux}[1]{\text{\upquotetype}#1\text{\upquotetype}}
\newcommand{\upquotesingle}{\renewcommand{\upquotetype}{\textquotesingle}\upquote@aux}
\newcommand{\upquotedouble}{\renewcommand{\upquotetype}{\textquotedbl}\upquote@aux}

\begin{document}
This is a 'sample' with some "quotes".

\begin{algorithm}[H]
  \begin{algorithmic}
    \State $a[\upquotesingle{x}] \gets 42$
    \State $a[\upquotedouble{x}] \gets 1337$
  \end{algorithmic}
  \caption{Some algorithm}
\end{algorithm}
\end{document}