TikZ 手册示例无法编译

TikZ 手册示例无法编译

我尝试了以下示例pgfmanual,但它产生了错误。

梅威瑟:

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{angles}
\usetikzlibrary{calc}
\pagestyle{empty}
\begin{document}

\tikz 
  \draw (2,0) coordinate (A) -- 
        (0,0) coordinate (B) -- 
        (1,1) coordinate (C)
        pic ["$\alpha$", draw, ->] {angle};

\end{document}

错误:

! Missing \endcsname inserted.
<to be read again> 
                   \alpha 
l.10 pic ["$\alpha$", draw, ->]
                                {angle};
? 

答案1

此示例需要两个 TikZ 库:anglesquotes

\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{angles,quotes}
\begin{document}
\tikz
  \draw (2,0) coordinate (A) -- 
        (0,0) coordinate (B) -- 
        (1,1) coordinate (C)
        pic ["$\alpha$", draw, ->] {angle};
\end{document}

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