对齐算法的文本内和文本外

Question

我使用该algorithm2e包来排版带有自定义关键字的算法以供输入和输出。

使用时\SetKwInput{KwInput}{Input}定义关键字，会添加冒号，但输入和输出不对齐。

使用时\SetKwInOut{KwInput}{Input}文本是对齐的。但是，冒号在右侧，因此会出现像“输入：”这样难看的空格，让人眼花缭乱。

我的问题是：如何才能获得输出（如下图所示）而无需\hspace在每个algorithm环境中进行摆弄？

以下是 MWE：

\documentclass[a4paper]{article}
\usepackage[ruled]{algorithm2e}

% Define keywords
\SetKwInput{KwInput}{Input}
\SetKwInput{KwOutput}{Output}

% This aligns the colons
%\SetKwInOut{KwInput}{Input}
%\SetKwInOut{KwOutput}{Output}

\begin{document}

    \begin{algorithm}[h]
        \KwInput{Network}

        \KwOutput{Flow}

        \begin{enumerate}
            \item Start with $\ldots$
        \end{enumerate}
        \caption{Some algorithm.}
    \end{algorithm}
\end{document}

Answer 1

\documentclass[a4paper]{article}
\usepackage[ruled]{algorithm2e}
\usepackage{etoolbox}

\makeatletter
\renewcommand{\SetKwInOut}[2]{%
  \sbox\algocf@inoutbox{\KwSty{#2}\algocf@typo:}%
  \expandafter\ifx\csname InOutSizeDefined\endcsname\relax% if first time used
    \newcommand\InOutSizeDefined{}\setlength{\inoutsize}{\wd\algocf@inoutbox}%
    \sbox\algocf@inoutbox{\parbox[t]{\inoutsize}{\KwSty{#2}\algocf@typo:\hfill}~}\setlength{\inoutindent}{\wd\algocf@inoutbox}%
  \else% else keep the larger dimension
    \ifdim\wd\algocf@inoutbox>\inoutsize%
    \setlength{\inoutsize}{\wd\algocf@inoutbox}%
    \sbox\algocf@inoutbox{\parbox[t]{\inoutsize}{\KwSty{#2}\algocf@typo:\hfill}~}\setlength{\inoutindent}{\wd\algocf@inoutbox}%
    \fi%
  \fi% the dimension of the box is now defined.
  \algocf@newcommand{#1}[1]{%
    \ifthenelse{\boolean{algocf@inoutnumbered}}{\relax}{\everypar={\relax}}%
%     {\let\\\algocf@newinout\hangindent=\wd\algocf@inoutbox\hangafter=1\parbox[t]{\inoutsize}{\KwSty{#2}\algocf@typo\hfill:}~##1\par}%
    {\let\\\algocf@newinout\hangindent=\inoutindent\hangafter=1\parbox[t]{\inoutsize}{\KwSty{#2}\algocf@typo:\hfill}~##1\par}%
    \algocf@linesnumbered% reset the numbering of the lines
  }}%
\makeatother

% Define keywords
%\SetKwInput{KwInput}{Input}
%\SetKwInput{KwOutput}{Output}

% This aligns the colons
\SetKwInOut{KwInput}{Input}
\SetKwInOut{KwOutput}{Output}

\begin{document}

    \begin{algorithm}[h]
        \KwInput{Network}

        \KwOutput{Flow}

        \begin{enumerate}
            \item Start with $\ldots$
        \end{enumerate}
        \caption{Some algorithm.}
    \end{algorithm}
\end{document}

Answer 2

如果您坚持使用单行\KwInput，则可以使用以下命令：

\documentclass[a4paper]{article}
\usepackage[ruled]{algorithm2e}
\usepackage{calc}

% Define keywords
\SetKwInput{KwInput}{Input}
\SetKwInput{KwOutput}{Output}
\let\oldKwInput\KwInput
\renewcommand{\KwInput}[1]{%
  \makebox[\widthof{\KwOutput{}}][l]{\oldKwInput{}#1}%
}

\begin{document}

\begin{algorithm}[h]
  \KwInput{Network}

  \KwOutput{Flow}

  \begin{enumerate}
    \item Start with $\ldots$
  \end{enumerate}
  \caption{Some algorithm.}
\end{algorithm}
\end{document}

\KwInput通过将 放置Input:在与 宽度匹配的框内，重新定义上述代码Output:。

Answer 3

这是一种不寻常的实现方法......使用tabular。

\documentclass[a4paper]{article}
\usepackage[ruled]{algorithm2e}

% Define keywords
\SetKwInput{KwInput}{Input}
\SetKwInput{KwOutput}{Output}

% This aligns the colons
%\SetKwInOut{KwInput}{Input}
%\SetKwInOut{KwOutput}{Output}

\begin{document}

    \begin{algorithm}[h]
    \tabcolsep=0pt
    \begin{tabular}{@{}ll}
        \KwInput{}&Network\\
        \KwOutput{}&Flow
    \end{tabular}
        \begin{enumerate}
            \item Start with $\ldots$
        \end{enumerate}
        \caption{Some algorithm.}
    \end{algorithm}

\end{document}