包中的換行演算法2e

Question

我正在使用演算法2e偽代碼包。我有一些很長的線需要換行。有沒有辦法縮排以下（斷行）行和/或在第一行標記以表示發生了換行（類似於列表包解決方案）

我發現了一個類似的問題對於列表包，之前已回答過，但我正在明確尋找演算法2e解決方案。

Answer 1

以下最小範例定義

• \nosemic：刪除行尾 (EOL) 字元的列印（通常為;）；
• \dosemic：恢復 EOL 字元的列印；
• \pushline：縮排一行1em（典型縮排）；由algorithm2eas提供\Indp；
• \popline：刪除縮排\pushline（取消縮排？）；由algorithm2eas提供\Indm

\documentclass{article}
\usepackage{algorithm2e}% http://ctan.org/pkg/algorithm2e
\makeatletter
\newcommand{\nosemic}{\renewcommand{\@endalgocfline}{\relax}}% Drop semi-colon ;
\newcommand{\dosemic}{\renewcommand{\@endalgocfline}{\algocf@endline}}% Reinstate semi-colon ;
\newcommand{\pushline}{\Indp}% Indent
\newcommand{\popline}{\Indm\dosemic}% Undent
\makeatother
\begin{document}
\begin{algorithm}[H]
  \SetAlgoLined
  \KwData{this text}
  \KwResult{how to write algorithm with \LaTeX2e }
    initialization\;
  \While{not at end of this document}{
    read current\;
    \eIf{understand}{
      go to next section\;
      \nosemic this is a very long statement that has to be\;
        \pushline\dosemic wrapped over two lines\;
      \popline current section becomes this one\;
    }{
      go back to the beginning of current section\;
    }
  }
  \caption{How to write algorithms}
\end{algorithm}
\end{document}​

因為我對你不熟悉algorithm2e設置，我不確定您希望如何組合這四個命令。因此，我將它們分開以最大限度地（但手動）使用。

Answer 2

事實上，有一個更簡單的解決方案：使用經典的\hangafter和\hangindent。這與algorithm2e.

筆記：

1. \skiptext是演算法中新區塊的文字縮排長度；所以我選擇這個縮排的1/2；

2. 無需重新定義內部宏，因為\algocf@endline幾乎所有宏都可以在algorithm2e.用於\SetEndCharOfAlgoLine重新定義行尾

\hangafter請參閱下面的使用和的範例\hangindent：

\documentclass{article}
\usepackage{algorithm2e}% http://ctan.org/pkg/algorithm2e
%
\newcommand{\nosemic}{\SetEndCharOfAlgoLine{\relax}}% Drop semi-colon ;
\newcommand{\dosemic}{\SetEndCharOfAlgoLine{\string;}}% Reinstate
\newcommand{\pushline}{\Indp}% Indent
\newcommand{\popline}{\Indm\dosemic}% Undent
%
\begin{document}
\begin{algorithm}[H]
  \SetAlgoLined
  \KwData{this text}
  \KwResult{how to write algorithm with \LaTeX2e }
    initialization\;
  \While{not at end of this document}{
    read current\;
    \eIf{understand}{
      go to next section\;
      \nosemic this is a very long statement that has to be\;
        \pushline\dosemic wrapped over two lines\;
      \popline current section becomes this one\;
      \hangindent=.5\skiptext\hangafter=1
      this is a very long statement that should be indented automatically on the next
      lines if this statement is longer than one line\;
      Following lines should be indented normally\;
    }{
      go back to the beginning of current section\;
    }
  }
  \caption{How to write algorithms}
\end{algorithm}
\end{document}​

Answer 3

\Indp並可\Indm在套件中用於algorithm2e縮排和刪除縮排。我已經測試過了。