如何引用已创建的计数器？

Question

（抱歉我的英语不好）我创建了一个会计来列举练习列表中的问题。最后我想引用给定的练习。但是 \label 和 \ref 命令对我不起作用。有人能帮帮我吗？

\documentclass[a4paper,12pt]{report}
\usepackage{amsmath,amsfonts,amscd,bezier}%gislaine
\usepackage{amssymb}
\usepackage[dvips]{graphicx}
\usepackage{pdfsync}
\usepackage{color}
\usepackage{hyperref}

\newcounter{eq}
\refstepcounter{eq}
%\setcounter{eq}{1}
\newcommand{\eq}{{\noindent {\bf{\arabic{eq}}}} \addtocounter{eq}{1}{\hspace{-0.1cm{{.}}}} }
\newcommand{\eqz}{{\setcounter{eq}{1}} {{\arabic{eq}}} \addtocounter{eq}{1}\hspace{-0.1cm{{.}}}}
%%%%%%%%%%%%%%%%%%%%

\begin{document}
\pagestyle{myheadings} \thispagestyle{empty}

\eq \label{eq1} Let $X$ be such that....

\eq \label{eq2}In this exercise consider $Y=2$ ...

\eq \label{eq3} Consider, in exercise \ref{eq1} (I would like to see the issue number 1)

\eq Here, consider in exercise \ref{eq2} (I would like to see the issue number 2) $Y=3$...

\eq Here, consider in exercise \ref{eq3} (I would like to see the issue number 3) $Y=5$...

\end{document}

Answer 1

您所需要的只是创建计数器、设置它、设置一个引用名称，然后就可以开始引用它。

让我用一个简短的例子来解释一下。

\documentclass{article}

\usepackage{environ, hyperref, cleveref}



 \newcounter{QuotCount}
 \setcounter{QuotCount}{0}
 %
 \NewEnviron{fquote}[3][0.8]{%
    \refstepcounter{QuotCount}%
    \par\vspace{0.5cm}\noindent
  \begin{tikzpicture} %\pbox[pos][height][inner-pos]{max-width}{text}
      \node[font=\large\bfseries](box){%
        \pbox{#1\linewidth}{\BODY \label{quot:#3}}};
                \node[inner sep=1pt,very thin,anchor=east,pink,font=\bfseries\fontsize{48}{48}\selectfont,yshift=-5pt]at(box.north west){``};
                 \node[inner sep=1pt,very thin,pink,anchor=west,font=\bfseries\fontsize{48}{48}\selectfont,yshift=-8pt,xshift=-2pt]at(box.south east){''};
                \node[inner sep=1pt,very thin,anchor=north west,gray,font=\small\sffamily]at(box.south west){\begin{minipage}[t][1cm][t]{0.8\linewidth}
                \ {#2}\end{minipage}};
   \end{tikzpicture}\par
}

 \crefname{QuotCount}{quote}{quotes}
 \Crefname{Quotcount}{Quote}{Quotes}

  \begin{document}
 \begin{hsquote}{Antoine de Saint-Exupéry}{adesigner}
 A designer knows that has has achieved perfection not when there is nothing left to add, but when there is nothing left to take away.
 \end{hsquote}

 \Cref{quot:designer} is a quote on design used in the tufte-book.

\end{document}

Answer 2

已经有包了，所以你可能需要使用它：

\documentclass[a4paper,12pt]{report}
\usepackage{amsmath,amsfonts,amscd,bezier}
\usepackage{amssymb}
\usepackage{color}

%%%%%%%%%%%%%%%%%%%%

\usepackage[thref]{ntheorem}
\usepackage{cleveref}
\newtheorem{exercise}{Exercise}
\newtheorem{nonum}{}


\begin{document}


\begin{exercise}\label{ex:foo}
foo
\end{exercise}


\begin{exercise}\label{ex:bar}
bar
\end{exercise}

\begin{nonum}\label{noex:foo}
foo
\end{nonum}


\begin{nonum}\label{noex:bar}
bar
\end{nonum}

References: \cref{ex:foo}, \cref{ex:bar} and \Cref{ex:foo}. 

References: \cref{noex:foo}, \cref{noex:bar} and \Cref{noex:foo}. 

\end{document}

以下是一些手册： http://www.ctan.org/pkg/cleveref， http://www.ctan.org/pkg/ntheorem。这里有一个替代方案： http://www.ctan.org/pkg/theorem。