我尝试创建一个exam从不同文件中选择的随机问题，如下所示这里。
我使用的代码可以工作，但只是在随机基础上随机化；例如，第一轮它会给出一组问题，第二至第四轮没有变化，第五轮和第六轮有新的顺序，另外几次编译也不会再有变化。
没有错误，只是编译时随机化失败。也许，这只是一个巧合。我只使用了 9 个文件，但它们仍然应该至少有 1 个变化（根据概率论）。
我在用TeXLive v1.17。
下面我有 3 个文件夹，分别名为“Photochem”、“Photophys”和“Quenching”。在每个文件夹中，我都有 3 个文件，分别名为PC1.tex、PC2.tex、PC3.tex；PP1.tex、PP2.tex、PP3.tex； 和Quench1.tex、Quench2.tex、Quench3.tex。
每个文件只包含文件名作为文本（就像一个Hello World例子），所以我可以看到正在选择哪个文件。
还有其他人能够复制这种情况吗？如果可以，我可以提出一些建议来克服它吗？
\documentclass{article}
%\usepackage[paperheight=3.0cm, paperwidth=12.0cm, margin=0.1cm]{geometry}% Simplify image capture
\usepackage{enumitem}
\usepackage{tikz}% Easy way to get all the pgf functions
% The list of topics determines how many questions will be in the quiz
% since it appears that you want one question per topic in a quiz.
% This could be auto generated.
\newcommand*{\ListOfTopics}{%
Photochem,% MUST have trailing % here
Photophys,%
Quenching%
}%
% These list of files names from each question can be auto generated
% but for example purposes I am just using the file names as the
% content in the file. The number of questions in each topic do not
% need to be the same. I would create directories with the topic
% names and auto generate this based on the directory and file names.
\pgfmathdeclarerandomlist{Photochem}{%
{PC1}%
{PC2}%
{PC3}%
}%
\pgfmathdeclarerandomlist{Photophys}{%
{PP1}%
{PP2}%
{PP3}%
}%
\pgfmathdeclarerandomlist{Quenching}{%
{Quench1}%
{Quench2}%
{Quench3}%
}%
\newcommand*{\NumberOfQuizes}{4}%
\begin{document}
\foreach \QuizNumber in {1,...,\NumberOfQuizes} {%
\clearpage% Start each quiz on a new page
\noindent\textbf{\Large Quiz Number \QuizNumber}%
\begin{enumerate}
\foreach \Topic in \ListOfTopics {%
% Determine random question to use form list
\pgfmathrandomitem{\RandomQuestion}{\Topic}
% The following should import the file named in \RandomQuestion
\item Random Question from Topic='\Topic':
\textbf{\Large\RandomQuestion}%
}%
\end{enumerate}
}%
\end{document}
答案1
问题可能出在随机种子上，但我没有查看tikz库内部。在我的解决方案中，我将随机种子设置为当前时间值中的一个值。
\documentclass{article}
\usepackage{datetime} % Needed for \currentsecond,\currentminute commands
\usepackage{calculator} % Needed for some calc, but perhaps can be done with tikz too
%\usepackage[paperheight=3.0cm, paperwidth=12.0cm, margin=0.1cm]{geometry}% Simplify image capture
\usepackage{enumitem}
\usepackage{tikz}% Easy way to get all the pgf functions
% The list of topics determines how many questions will be in the quiz
% since it appears that you want one question per topic in a quiz.
% This could be auto generated.
\newcommand*{\ListOfTopics}{%
Photochem,% MUST have trailing % here
Photophys,%
Quenching%
}%
% These list of files names from each question can be auto generated
% but for example purposes I am just using the file names as the
% content in the file. The number of questions in each topic do not
% need to be the same. I would create directories with the topic
% names and auto generate this based on the directory and file names.
\pgfmathdeclarerandomlist{Photochem}{%
{PC1}%
{PC2}%
{PC3}%
}%
\pgfmathdeclarerandomlist{Photophys}{%
{PP1}%
{PP2}%
{PP3}%
}%
\pgfmathdeclarerandomlist{Quenching}{%
{Quench1}%
{Quench2}%
{Quench3}%
}%
\newcommand*{\NumberOfQuizes}{8}%
\begin{document}
\def\TotalSecondsMinute{}
\def\TotalSeconds{}
\MULTIPLY{\currentminute}{60.0}{\TotalSecondsMinute}
\ADD{\TotalSecondsMinute}{\currentsecond}{\TotalSeconds}
\TotalSeconds
\pgfmathsetseed{\TotalSeconds}% Uses the number of seconds since the hour started
\foreach \QuizNumber in {1,...,\NumberOfQuizes} {%
%\clearpage% Start each quiz on a new page
\noindent\textbf{\Large Quiz Number \QuizNumber}%
\begin{enumerate}
\foreach \Topic in \ListOfTopics {%
% Determine random question to use form list
\pgfmathrandomitem{\RandomQuestion}{\Topic}
% The following should import the file named in \RandomQuestion
\item Random Question from Topic='\Topic':
\textbf{\Large\RandomQuestion}%
}%
\end{enumerate}
}%
\end{document}
它改变了问题——这符合您的需要吗？
编辑 有一行不必要的代码--我将其删除了。