\Titleofalg 带有 algorithm2e 包

Question

以下代码给出了一个错误，但我不确定为什么：

\documentclass{beamer}

\usepackage{default}
% typesetting of algorithms
\usepackage[vlined,linesnumbered]{algorithm2e}
\SetArgSty{textnormal}
\SetCommentSty{textnormal}

\begin{document}

\begin{frame}%{ % Implementation of pin() (((

  \frametitle{Implementation of \texttt{pin\,()}}

  \begin{function}[H]
    \Titleofalgo{ \texttt{pin($\mathit{pageno}$)}}
    \eIf
      {buffer pool already contains $\mathit{pageno}$}
      {$\texttt{pinCount\,(\(\mathit{pageno}\))} \leftarrow
           \texttt{pinCount\,(\(\mathit{pageno}\))} + 1$ \;
       \Return{address of frame holding $\mathit{pageno}$ \;}}
      {select a victim frame $v$ using the replacement policy \;
       \If{$\texttt{dirty\,(\(v\))}$}
          {write $v$ to disk \;}
       read page $\mathit{pageno}$ from disk into frame $v$ \;
       $\texttt{pinCount\,(\(\mathit{pageno}\))} \leftarrow 1$ \;
       $\texttt{dirty\,(\(\mathit{pageno}\))} \leftarrow \text{false}$ \;
       \Return{address of frame $v$} \;
      }
 \end{function}
\end{frame} 

\end{document}

我收到的错误信息是

./test.tex:31: Undefined control sequence.
\beamer@doifinframe ...{function}[H] \Titleofalgo 
                                                  { \texttt {pin($\mathit {p...
l.31 \end{frame}

我不知道为什么。请问我遗漏了什么？

Answer 1

注意正确的拼写；它是\TitleOfAlgo（T、O、A 大写）而不是\Titleofalgo：

\documentclass{beamer}

\usepackage{default}
% typesetting of algorithms
\usepackage[vlined,linesnumbered]{algorithm2e}
\SetArgSty{textnormal}
\SetCommentSty{textnormal}

\begin{document}

\begin{frame}%{ % Implementation of pin() (((

  \frametitle{Implementation of \texttt{pin\,()}}

  \begin{function}[H]
    \TitleOfAlgo{\texttt{pin($\mathit{pageno}$)}}
    \eIf
      {buffer pool already contains $\mathit{pageno}$}
      {$\texttt{pinCount\,(\(\mathit{pageno}\))} \leftarrow
           \texttt{pinCount\,(\(\mathit{pageno}\))} + 1$ \;
       \Return{address of frame holding $\mathit{pageno}$ \;}}
      {select a victim frame $v$ using the replacement policy \;
       \If{$\texttt{dirty\,(\(v\))}$}
          {write $v$ to disk \;}
       read page $\mathit{pageno}$ from disk into frame $v$ \;
       $\texttt{pinCount\,(\(\mathit{pageno}\))} \leftarrow 1$ \;
       $\texttt{dirty\,(\(\mathit{pageno}\))} \leftarrow \text{false}$ \;
       \Return{address of frame $v$} \;
      }
 \end{function}
\end{frame} 

\end{document}

结果：

我还删除了标题中的虚假空白。

Answer 2

你忘了 TeX 区分大小写——命令是\TitleOfAlgo，并且没有default包——只有default themebeamer 的：

\documentclass{beamer}

\usetheme{default}
% typesetting of algorithms
\usepackage[vlined,linesnumbered]{algorithm2e}
\SetArgSty{textnormal}
\SetCommentSty{textnormal}

\begin{document}

\begin{frame}%{ % Implementation of pin() (((

  \frametitle{Implementation of \texttt{pin\,()}}

  \begin{function}[H]
    \TitleOfAlgo{ \texttt{pin($\mathit{pageno}$)}}
    \eIf
      {buffer pool already contains $\mathit{pageno}$}
      {$\texttt{pinCount\,(\(\mathit{pageno}\))} \leftarrow
           \texttt{pinCount\,(\(\mathit{pageno}\))} + 1$ \;
       \Return{address of frame holding $\mathit{pageno}$ \;}}
      {select a victim frame $v$ using the replacement policy \;
       \If{$\texttt{dirty\,(\(v\))}$}
          {write $v$ to disk \;}
       read page $\mathit{pageno}$ from disk into frame $v$ \;
       $\texttt{pinCount\,(\(\mathit{pageno}\))} \leftarrow 1$ \;
       $\texttt{dirty\,(\(\mathit{pageno}\))} \leftarrow \text{false}$ \;
       \Return{address of frame $v$} \;
      }
 \end{function}
\end{frame}

\end{document}