[Tex/LaTex] Footnote in table

Question

I have some table like the following one and want to write some configuration using ´footnote´.

\begin{table}
  \begin{center}
    \begin{footnotesize}
     \begin{tabular}{|l|l|l|}
     \hline 
     TPA & Components & Cost \\ \hline
      & Total & 56558.4 \\ \hline 
     \end{tabular}
    \end{footnotesize}
    \caption[]{Hardware cost estimation~\footnote{per router}}
    \label{tab:}
  \end{center}
\end{table}

So, I did a method like http://www.tex.ac.uk/cgi-bin/texfaq2html?label=ftncapt.
However, I found upper subscript but didn't figure out how to use a footnote in my table.
Where is the footnote I wrote? I want to see "per router".

Could you please fix my LaTeX code?

Answer 1

You might want to use the tablefootnote package (and probably you want to

1. remove the \begin{footnotesize} \end{footnotesize}, otherwise the table is printed in footnote size;
2. replace the center-environment by a simple \centering; and
3. remove the ~ before the \tablefootnote, because the ~ causes a (non-breakable) space before the footnote-mark).

Minimal example:

\documentclass{article}
\usepackage{tablefootnote}
\begin{document}

\begin{table}
  %\begin{center}% replaced by \centering
  \centering
    %\begin{footnotesize}
     \begin{tabular}{|l|l|l|}
     \hline 
     TPA & Components & Cost \\ \hline
      & Total & 56558.4 \\ \hline 
     \end{tabular}
    %\end{footnotesize}
    \caption[Hardware cost estimation]{%
      Hardware cost estimation\tablefootnote{per router}\label{tab:}}
  %\end{center}
\end{table}
\end{document}