![使用答案包的自定义环境](https://linux22.com/image/274024/%E4%BD%BF%E7%94%A8%E7%AD%94%E6%A1%88%E5%8C%85%E7%9A%84%E8%87%AA%E5%AE%9A%E4%B9%89%E7%8E%AF%E5%A2%83.png)
我想创建一个与包一起使用的自定义环境answers
,例如
...
\usepackage{answers}
\Newassociation{solu}{Soln}{ans}
\newtheorem{ex}{Ejercicio}[chapter]
\newenvironment{exer}{\begin{ex}\normalfont}{\end{ex}}
\newenvironment{\exercises}[1]{
\bigskip%
\Opensolutionfile{ans}[ans\thechapter]
....
}{ \Closesolutionfile{ans}... }
\begin{document}
....
\begin{exercises}
\begin{exer} blabla...1
\begin{sol}
blahblah 1
\end{sol}
\end{exer}
\begin{exer} blabla...2
\begin{sol}
blahblah 2
\end{sol}
\end{exer}
\end{exercises}
...但我做不到。你能帮助我吗?
答案1
解决方案很简单,正如我们所见:
\documentclass{book}
\usepackage[centering,text={18cm,22cm},showframe=false]{geometry}
\setcounter{chapter}{0}
\usepackage{amsmath,amssymb,amsfonts,latexsym}
\usepackage{xparse}
\usepackage{tcolorbox}
\tcbuselibrary{skins,breakable}
\usepackage{answers}
\newtheorem{exer}{}[chapter]
\newenvironment{ejer}{\begin{exer}\normalfont}{\end{exer}}
\Newassociation{solu}{Soln}{ans}
% box---------------------------------------------------------------
\colorlet{color1}{gray!5!white}
\definecolor{color2}{RGB}{117,184,68}
\newtcolorbox{wwlistaejercicios}[1][]{%
arc=0mm,breakable,enhanced,colback=color1,boxrule=0pt,top=8mm,
enlarge top by=\baselineskip/2+1mm, enlarge top at break by=0mm,pad at break=2mm,fontupper=\normalsize,
overlay ={
\node[rectangle, minimum width=4cm, top color=color2, bottom color=color2,
inner sep=1mm,anchor=west,font=\normalsize] at ([xshift=0pt,yshift=-3mm]frame.north west)%
{\textbf{Ejercicios}};}#1}
% Custom environment--------------------------------------------------
\NewDocumentEnvironment{ejercicios}{O{}}{%
\bigskip\begin{wwlistaejercicios}%
\expandafter\ifx\csname Closesolutionfile\endcsname \relax\else
\Closesolutionfile{ans}\fi
\Opensolutionfile{ans}[ans\thechapter]
#1}{\end{wwlistaejercicios}\bigskip } %
% Close ans
\def\soluciones{
\expandafter\ifx\csname Closesolutionfile\endcsname \relax\else
\Closesolutionfile{ans}\fi
}
% Include ans#i for chapter i
\def\solucionesCap#1{\section*{Soluciones del Cap\'{\i}tulo #1}\input{ans#1}}
%----------------------------------------------------------------------
\begin{document}
\chapter{First List}
\section{Excercises - List 1}
\begin{ejercicios}
\begin{ejer} Resolver $|\tan(\theta)|=1$ con $\theta \in\, R.$
\begin{solu}
{\bf Sugerencia:} Mmmmmm
\end{solu}
\end{ejer}
\begin{ejer} Resolver $|\sec(\theta)|=1$ con $\theta \in\, R^+$
\begin{solu}
$|\sec(\theta)|=1 \Longrightarrow....$
\end{solu}
\end{ejer}
\end{ejercicios}
\chapter{Second List}
\section{Excercises - List 2}
\begin{ejercicios}
\begin{ejer} Resolver $|\cos(\theta)|=1$ con $\theta \in\, R.$
\begin{solu}
$|\cos(\theta)|=1 \Longrightarrow \theta=k\pi, \; k \in\, Z$
\end{solu}
\end{ejer}
\begin{ejer} Resolver $|\sin(\theta)|=1$ con $\theta \in\, R^+$
\begin{solu}
$|\sin(\theta)|=1 \Longrightarrow \theta=(2k+1)
\displaystyle\frac{\pi}{2}, \; k \in\, Z^+$
\end{solu}
\end{ejer}
\begin{ejer} Resolver
\begin{enumerate}
\item[a.)] $|2\sin(\theta)\cos(\theta)|=1$ con $\theta \in\, R^+$
\item[b.)] $|2\sin(\theta)\cos(\theta)|=1$ con $\theta \in\, R$
\end{enumerate}
\begin{solu}
Ejercicio para el estudiante.
\end{solu}
\end{ejer}
\end{ejercicios}
\chapter*{Solutions to excercises}
% Print solutions
\soluciones % Mandatory (to close ans)
\solucionesCap{1}
\solucionesCap{2}
\end{document}