Print macro content with condition

Question

I would like something like the following:

\documentclass{article}
\newcommand{\acell}{}
\newcommand{\bcell}
\newccomand{\zcell}[1]{#1}
\ifx\acell{A}
 \ifx\bcell{A}
  \zcell{yes}
 \else
  \zcell{no}
 \fi
\else
\fi
\begin{document}
\begin{tabular}{ccc}
\acell{A} & \bcell{A} & \zcell{} \\
\acell{A} & \bcell{B} & \zcell{} \\  
\end{document}

But this code does not work. It does not print "yes" and "no" where the 'zcell' macro is. Is it possible to achieve this?

Yes, it is, but under which rules? Besides the errors pointed out by David Carlisle, the conditions aren’t even inside a command but just in the preamble (and \newccomand is mis-typed). Do you want to test both cells whether they are A? — Qrrbrbirlbel, Jun 08 '13 at 01:00

score 5 · Answer 1 · edited Jun 16 '17 at 14:53

You can do the following whereby I don't know what you want to achieve:

\documentclass[11pt]{article}
\makeatletter
\def\acell#1{\gdef\@acell{#1}}
\def\bcell#1{\gdef\@bcell{#1}}
\def\zcell{%
 \ifx\@acell\@bcell
     yes\acell{a}\bcell{b}%
 \else
   no
 \fi%
}
\makeatother
\begin{document}
\begin{tabular}{ccc}
\acell{A} & \bcell{A} & \zcell{} \\
\acell{A} & \bcell{B} & \zcell{} \\  
\end{tabular}
\end{document}

Some other hints:

The material of a table cell is always local. So \gdef is needed.
What does \ifx\\#1\\ stand for? -- Explained \ifx
How to make a new command similar to \author -- explained the definition of \acell

David Carlisle · Accepted Answer · 2017-06-03T13:08:07.690

Your question isn't very clear (and your example is very incomplete) but I think you want

enter image description here

\documentclass{article}
\newcommand{\acell}[1]{\gdef\acontent{#1}#1}
\newcommand{\bcell}[1]{\gdef\bcontent{#1}#1}
\def\atest{A}
\newcommand{\zcell}{%
\ifx\acontent\atest
 \ifx\bcontent\atest
  yes%
 \else
  no%
 \fi
\else
  no%
\fi}
\begin{document}
\begin{tabular}{ccc}
\acell{A} & \bcell{A} & \zcell \\
\acell{A} & \bcell{B} & \zcell 
\end{tabular}
\end{document}

some notes on your example

\newcommand{\acell}{}

defines \acell to take no arguments and expand to nothing but you were using it as if it took an argument.

\newcommand{\bcell}

is a syntax error (you haven't provided a definition at all)

\newccomand{\zcell}[1]{#1}

just defines \zcell to echo its argument.

\ifx\acell{A}

is not in any definition and compares the token \acell to the token { then skips to the matching \fi as those tokens are not equal.

You add a picture :-) -- Should I add one too. – Marco Daniel Jun 07 '13 at 23:05 — Marco Daniel, Jun 07 '13 at 23:05

Print macro content with condition

2 Answers2