Continuous Counter for Figures

Question

How to float a figure counter such that it displays section than counter with figures, theorems and definitions? e.g

Figure 1.1

Definition 1.2

Figure 1.3

Algorithm 1.4

Theorem 1.5

etc.

Answer 1

I've understood the question as definition, figure, algorithm etc. should either share the same counter or are stepped with each other.

I use a coupled counter approach from xassoccnt package, forming a group of coupled counters with \DeclareCoupledCountersGroupName and assigning the relevant counters to this group.

Please note that due to the floating behaviour of figure environment the order of appearance and numbering is not the same then! Consider to use something like \FloatBarrier from picins package in order to prevent this!

\documentclass{article}

\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{amsthm}

\newtheorem{theorem}{Theorem}[section]
\newtheorem{example}{Example}[section]
\newtheorem{definition}{Definition}[section]
\usepackage{blindtext}
\usepackage{chngcntr}
\usepackage{xassoccnt}

\DeclareCoupledCountersGroup{figtheoexadef}
\DeclareCoupledCounters[name=figtheoexadef]{theorem,figure,example,definition}
\counterwithin{figure}{section}

\usepackage{hyperref}
\begin{document}
\tableofcontents
\section{Foo section}
\begin{definition}{Foo}
\blindtext
\end{definition}

\begin{figure}
\blindtext

\caption{A figure}
\end{figure}


\begin{theorem}{Foo}
\blindtext
\end{theorem}               %

\begin{example}{Foo}
\blindtext
\end{example}               %

\begin{figure}
\blindtext
\caption{Yet another figure}
\end{figure}

\section{Foobar section}

\begin{figure}
\blindtext
\caption{Another figure}
\end{figure}


\begin{theorem}{Foo}
\blindtext
\end{theorem}               %

\begin{example}{Foo}
\blindtext
\end{example}               %

\begin{figure}
\blindtext
\caption{More figures}
\end{figure}

\begin{definition}{Foo}
\blindtext
\end{definition}

\end{document}