我必須創建一系列練習，所有練習都具有相同的項目：
- 標題
- 影像
- 問題
- 解決方案
- ETC..
我想為每個練習建立一個單獨的文件，然後從我的主文檔中能夠多次引用這些特定部分。我希望能夠在每個項目中放入方程式、圖像、tikz 等。
我考慮為每種情況建立一個包含巨集定義的文件，例如：
ex1.sty
\newcommand\ex1sol{
(contents)
}
...
然後在需要的地方調用宏，但這不起作用，我覺得無論如何都必須有一個更好的解決方案，因為這看起來並不是一個罕見的應用程式。本質上，它意味著以不同的格式呈現相同的內容。
答案1
作為一個變體我的答案到使用 Latex 程式碼區塊作為庫 - 用於重複使用 Latex 元素，例如多種表示形式的圖形我可以提供一個介面，其中具有可指定部分的文件具有模式
\filesection{⟨name of section⟩}
⟨code⟩
\endfilesection
%-------------------------------------------------------------
\filesection{⟨name of section⟩}
⟨code⟩
\endfilesection
%-------------------------------------------------------------
\filesection{⟨name of section⟩}
⟨code⟩
\endfilesection
%-------------------------------------------------------------
\endinput您使用命令輸入這些文件
\inputfilesection{⟨name of file⟩}{⟨name of section⟩}這⟨代碼⟩\inputfilesection僅當-command 和\filesection-comand 具有相同的值時才會執行文件部分的⟨章節名稱⟩-爭論。
在這種情況下⟨代碼⟩將在 verbatim-catcode-régime 下閱讀。然後將結果傳遞給\scantokens重新標記化和正常處理。
一些\filesections 可以具有相同的⟨章節名稱⟩。在這種情況下，文件中出現的相關名稱的所有文件部分均由\inputfilesection.
我知道的注意事項：
!!!不要在!!!\inputfilesection呼叫的內部文件中執行操作\inputfilesection
%
% An example file with \filesection-commands:
%
%\begin{filecontents*}[overwrite]{FileWithSections.tex}
\begin{filecontents*}{FileWithSections.tex}
\filesection{First Section}
Some text in First Section Of FileWithSections.tex.
\begin{verbatim*}
Some verbatim material in
First Section Of FileWithSections.tex.
\end{verbatim*}
\endfilesection
%-------------------------------------------------------------
\filesection{Second Section}
Some text in Second Section Of FileWithSections.tex.
\begin{verbatim*}
Some verbatim material in
Second Section Of FileWithSections.tex.
\end{verbatim*}
\endfilesection
%-------------------------------------------------------------
\filesection{Third Section}
Some text in Third Section Of FileWithSections.tex.
\begin{verbatim*}
Some verbatim material in
Third Section Of FileWithSections.tex.
\end{verbatim*}
\endfilesection
%-------------------------------------------------------------
\endinput
\end{filecontents*}
\documentclass{article}
\usepackage{graphicx}
\makeatletter
%///// start of code that could go into a package / .sty-file//////////////////
\@ifundefined{NewDocumentCommand}{\RequirePackage{xparse}}{}%
\NewDocumentCommand\inputfilesection{mm}{%
\def\@stringincommand{#2}%
\input{#1}%
}%
\newcommand\@stringincommand{}%
\newcommand\@stringinfile{}%
\NewDocumentCommand\filesection{m}{%
\begingroup
\let\do\@makeother\dospecials
\do\^^I%
\do\^^M%
\@filesection{#1}%
}%
\begingroup
\newcommand\@filesection[2]{%
\endgroup
\def\@filesection##1##2#1{%
\def\@stringinfile{##1}%
\expandafter\endgroup
\ifx\@stringinfile\@stringincommand\expandafter\@firstofone\else\expandafter\@gobble\fi
{%
\begingroup
\newlinechar=\endlinechar
\scantokens\expandafter\expandafter\expandafter{%
\expandafter\expandafter\expandafter\endgroup
\UD@RemoveLeadingNTrailingCarriageReturn{##2}#2}%
}\ignorespaces
}%
}%
\@firstofone{%
\let\do\@makeother\dospecials
\catcode`\{=1 %
\catcode`\}=2 %
\@filesection
}{\endfilesection}{\ignorespaces%}%
%=================================================================================
% Begin of code for removing one leading and one trailing explicit
% <carriage-return>-character-token of catcode 12(other) from _verbatimized_
% argument
%=================================================================================
\@ifdefinable\UD@stopromannumeral{\chardef\UD@stopromannumeral=`\^^00}%
%%-----------------------------------------------------------------------------
%% Check whether argument is empty:
%%.............................................................................
%% \UD@CheckWhetherNull{<Argument which is to be checked>}%
%% {<Tokens to be delivered in case that argument
%% which is to be checked is empty>}%
%% {<Tokens to be delivered in case that argument
%% which is to be checked is not empty>}%
%%
%% The gist of this macro comes from Robert R. Schneck's \ifempty-macro:
%% <https://groups.google.com/forum/#!original/comp.text.tex/kuOEIQIrElc/lUg37FmhA74J>
\newcommand\UD@CheckWhetherNull[1]{%
\romannumeral\expandafter\@secondoftwo\string{\expandafter
\@secondoftwo\expandafter{\expandafter{\string#1}\expandafter
\@secondoftwo\string}\expandafter\@firstoftwo\expandafter{\expandafter
\@secondoftwo\string}\expandafter\UD@stopromannumeral\@secondoftwo}{%
\expandafter\UD@stopromannumeral\@firstoftwo}%
}%
%%-----------------------------------------------------------------------------
\begingroup
\@makeother\^^M%
\@firstofone{%
\endgroup%
%%=============================================================================
%% Check whether_verbatimized_ argument has a leading explicit
%% <carriage-return>-character-token of catcode 12(other):
%%-----------------------------------------------------------------------------
%% \UD@CheckWhetherLeadingCarriageReturn{<Argument which is to be checked>}%
%% {<Tokens to be delivered in case
%% <argument which is to be checked>'s
%% 1st token is an explicit <carriage-
%% return>-character-token of
%% catcode 12(other)>}%
%% {<Tokens to be delivered in case
%% <argument which is to be checked>'s
%% 1st token is not an explicit
%% <carriage-return>-character-token of
%% catcode 12(other)>}%
\newcommand\UD@CheckWhetherLeadingCarriageReturn[1]{%
\UD@@CheckWhetherLeadingCarriageReturn\UD@SelDom#1\UD@SelDom^^M\UD@@SelDom%
}%
\@ifdefinable\UD@@CheckWhetherLeadingCarriageReturn{%
\long\def\UD@@CheckWhetherLeadingCarriageReturn#1\UD@SelDom^^M#2\UD@@SelDom{%
\UD@CheckWhetherNull{#2}{\@secondoftwo}{\@firstoftwo}%
}%
}%
%%-----------------------------------------------------------------------------
%% Check whether_verbatimized_ argument having a leading explicit <carriage-
%% return>-character-token of catcode 12(other) consists only of such tokens:
%%-----------------------------------------------------------------------------
%% \UD@CheckWhetherOnlyCarriageReturn{<Argument which is to be checked and
%% which is known to have a leading explicit
%% <carriage-return>-character-token of
%% catcode 12(other)>}%
%% {<Tokens to be delivered in case <argument
%% which is to be checked> consists only
%% of explicit <carriage-return>-character-
%% tokens of catcode 12(other)>}%
%% {<Tokens to be delivered in case <argument
%% which is to be checked> does not consist
%% only of explicit <carriage-return>-
%% character-tokens of catcode 12(other)>}%
\newcommand\UD@CheckWhetherOnlyCarriageReturn[1]{%
\UD@CheckWhetherLeadingCarriageReturn{#1}{%
\expandafter\UD@CheckWhetherOnlyCarriageReturn%
\expandafter{\UD@@TrimLeadingCarriageReturn#1}%
}{%
\UD@CheckWhetherNull{#1}{\@firstoftwo}{\@secondoftwo}%
}%
}%
%%-----------------------------------------------------------------------------
%% Remove one leading explicit <carriage-return>-character-token of
%% catcode 12(other) from _verbatimized_ argument:
%%-----------------------------------------------------------------------------
\@ifdefinable\UD@@TrimLeadingCarriageReturn{%
\long\def\UD@@TrimLeadingCarriageReturn^^M{}%
}%
%%-----------------------------------------------------------------------------
%% Check whether_verbatimized_ argument has a trailing explicit
%% <carriage-return>-character-token of catcode 12(other):
%%-----------------------------------------------------------------------------
%% \UD@CheckWhetherTrailingCarriageReturn{<Argument which is to be checked>}%
%% {<Tokens to be delivered in case
%% <argument which is to be checked>'s
%% last token is an explicit <carriage-
%% return>-character-token of
%% catcode 12(other)>}%
%% {<Tokens to be delivered in case
%% <argument which is to be checked>'s
%% last token is not an explicit
%% <carriage-return>-character-token of
%% catcode 12(other)>}%
\newcommand\UD@CheckWhetherTrailingCarriageReturn[1]{%
\UD@@CheckWhetherTrailingCarriageReturn#1\UD@SelDom^^M\UD@SelDom\UD@@SelDom%
}%
\@ifdefinable\UD@@CheckWhetherTrailingCarriageReturn{%
\long\def\UD@@CheckWhetherTrailingCarriageReturn#1^^M\UD@SelDom#2\UD@@SelDom{%
\UD@CheckWhetherNull{#2}{\@secondoftwo}{\@firstoftwo}%
}%
}%
%%-----------------------------------------------------------------------------
%% Remove one trailing explicit <carriage-return>-character-token of
%% catcode 12(other) from _verbatimized_ argument:
%%-----------------------------------------------------------------------------
\newcommand\UD@TrimTrailingCarriageReturn[1]{%
\UD@@TrimTrailingCarriageReturn#1\UD@SelDom%
}%
\@ifdefinable\UD@@TrimTrailingCarriageReturn{%
\long\def\UD@@TrimTrailingCarriageReturn#1^^M\UD@SelDom{#1}%
}%
%%-----------------------------------------------------------------------------
%% Remove one leading and one trailing explicit <carriage-return>-character-
%% token of catcode 12(other) from _verbatimized_ argument if present.
%% In the edge case of the _verbatimized_ argument consisting only of explicit
%% <carriage-return>-character-tokens of catcode 12(other) remove only one of
%% them.
%% Due to \romannumeral-expansion the result is delivered in 2 expansion-steps:
%%-----------------------------------------------------------------------------
\newcommand\UD@RemoveLeadingNTrailingCarriageReturn[1]{%
\romannumeral%
\UD@CheckWhetherLeadingCarriageReturn{#1}{%
\UD@CheckWhetherTrailingCarriageReturn{#1}{%
\UD@CheckWhetherOnlyCarriageReturn{#1}{%
\expandafter\UD@stopromannumeral\UD@@TrimLeadingCarriageReturn#1%
}{%
\expandafter\expandafter\expandafter\expandafter\expandafter%
\expandafter\expandafter\UD@stopromannumeral\expandafter%
\UD@TrimTrailingCarriageReturn\expandafter{\UD@@TrimLeadingCarriageReturn#1}%
}%
}{%
\expandafter\UD@stopromannumeral\UD@@TrimLeadingCarriageReturn#1%
}%
}{%
\UD@CheckWhetherTrailingCarriageReturn{#1}{%
\expandafter\expandafter\expandafter\UD@stopromannumeral%
\UD@TrimTrailingCarriageReturn{#1}%
}{\UD@stopromannumeral#1}%
}%
}%
}%
%================================================================================
% End of code for removing one leading and one trailing explicit
% <carriage-return>-character-token of catcode 12(other) from _verbatimized_
% argument
%================================================================================
%///// end of code that could go into a package / .sty-file////////////////////
\makeatother
\begin{document}
\noindent
\inputfilesection{FileWithSections.tex}{First Section}
\noindent\hrule\null
\noindent
\inputfilesection{FileWithSections.tex}{Second Section}
\noindent\hrule\null
\noindent
\inputfilesection{FileWithSections.tex}{Third Section}
\noindent\hrule\null
\noindent
\inputfilesection{FileWithSections.tex}{First Section}
\noindent\hrule\null
\noindent
\inputfilesection{FileWithSections.tex}{Second Section}
\noindent\hrule\null
\noindent
\inputfilesection{FileWithSections.tex}{Third Section}
\end{document}
