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模 9 整数表的格式化问题

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模 9 整数表的格式化问题

我在用 LaTeX 格式化表格时遇到了一些问题。我尝试格式化一个表格以进行整数模 9 的加法运算，但结果却不正常。

这是我目前拥有的：

\begin{center}
\begin{tabular}{ c|c c c c c c c c c }
$+_9$ & [0] & [1] & [2] & [3] & [4] & [5] & [6] & [7] & [8] \\
\hline
[0] & [0] & [1] & [2] & [3] & [4] & [5] & [6] & [7] & [8] \\
[1] & [1] & [2] & [3] & [4] & [5] & [6] & [7] & [8] & [0] \\
[2] & [2] & [3] & [4] & [5] & [6] & [7] & [6] & [0] & [1] \\
[3] & [3] & [4] & [5] & [6] & [7] & [8] & [6] & [1] & [2] \\
[4] & [4] & [5] & [6] & [7] & [8] & [0] & [6] & [2] & [3] \\
[5] & [5] & [6] & [7] & [8] & [0] & [1] & [6] & [3] & [4] \\
[6] & [6] & [7] & [8] & [0] & [1] & [2] & [3] & [4] & [5] \\
[7] & [7] & [8] & [0] & [1] & [2] & [3] & [6] & [5] & [6] \\
[8] & [8] & [0] & [1] & [2] & [3] & [4] & [5] & [6] & [7] \\
\end{tabular}
\end{center}

由于我无法弄清楚的原因，这个方法不起作用。但是，如果我只处理前两行，如下所示：

\begin{center}
\begin{tabular}{ c|c c c c c c c c c }
$+_9$ & [0] & [1] & [2] & [3] & [4] & [5] & [6] & [7] & [8] \\
\hline
[0] & [0] & [1] & [2] & [3] & [4] & [5] & [6] & [7] & [8] \\
\end{tabular}
\end{center}

一切运行正常。有人知道哪里出了问题吗？

答案1

换行符认为[1]后面的（或其他内容）是一个可选参数，除非您告诉它停止。

\documentclass{article}
\begin{document}
\begin{center}
\begin{tabular}{ c|c c c c c c c c c }
$+_9$ & [0] & [1] & [2] & [3] & [4] & [5] & [6] & [7] & [8] \\
\hline
[0] & [0] & [1] & [2] & [3] & [4] & [5] & [6] & [7] & [8] \\\relax
[1] & [1] & [2] & [3] & [4] & [5] & [6] & [7] & [8] & [0] \\\relax
[2] & [2] & [3] & [4] & [5] & [6] & [7] & [6] & [0] & [1] \\\relax
[3] & [3] & [4] & [5] & [6] & [7] & [8] & [6] & [1] & [2] \\\relax
[4] & [4] & [5] & [6] & [7] & [8] & [0] & [6] & [2] & [3] \\\relax
[5] & [5] & [6] & [7] & [8] & [0] & [1] & [6] & [3] & [4] \\\relax
[6] & [6] & [7] & [8] & [0] & [1] & [2] & [3] & [4] & [5] \\\relax
[7] & [7] & [8] & [0] & [1] & [2] & [3] & [6] & [5] & [6] \\\relax
[8] & [8] & [0] & [1] & [2] & [3] & [4] & [5] & [6] & [7]
\end{tabular}
\end{center}
\end{document}

答案2

这是另一个解决方案，使用\halign：

\def\pdig#1#2#3#4#5#6#7#8#9{[#1] [#2] [#3] [#4] [#5] [#6] [#7] [#8] [#9]}
\def\trule{\vrule height10pt depth4pt\relax}
\vbox{\offinterlineskip\halign{\hfil#\hfil\trule\ &\pdig#\cr
$+_9$ & 0  1  2  3  4  5  6  7  8 \cr
\noalign{\hrule}
[0]   & 0  1  2  3  4  5  6  7  8 \cr
[1]   & 1  2  3  4  5  6  7  8  0 \cr
[2]   & 2  3  4  5  6  7  6  0  1 \cr
[3]   & 3  4  5  6  7  8  6  1  2 \cr
[4]   & 4  5  6  7  8  0  6  2  3 \cr
[5]   & 5  6  7  8  0  1  6  3  4 \cr
[6]   & 6  7  8  0  1  2  3  4  5 \cr
[7]   & 7  8  0  1  2  3  6  5  6 \cr
[8]   & 8  0  1  2  3  4  5  6  7 \cr
}}

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