程序包 PGF 数学错误：未知运算符“c”或“c@”

Question

我正在使用 TikZ 包制作流程图。我收到以下错误：Package PGF Math Error: Unknown operator c' orc@' (in '1c'). \node (in1) [input] {node};

我不明白错误指的是什么。这是我的代码：

\usepackage{tikz}
\usetikzlibrary{shapes.geometric, arrows}


\tikzstyle{question} = [rectangle, minimum width=3cm, minimum height=1cm,text centered, draw=black]
\tikzstyle{diagnosis} = [rectangle, rounded corners, minimum width=3cm, minimum height=1cm, text centered, draw=black]
\tikzstyle{input} = [diamond, minimum width=3cm, minimum height=1c, text centered, draw=black]
\tikzstyle{arrow} = [thick,->,>=stealth]

\begin{tikzpicture}[node distance=2cm]

\node (in1) [input] {node};
\node (q1) [question, below of=in1] {Matches distractor node?};
\draw [arrow] (in1) -- (q1);

\end{tikzpicture}

Answer 1

你的文风有点问题input。你写错了minimum height=1c。我想你的意思是minimum height=1cm：

\tikzstyle{input} = [diamond, minimum width=3cm, minimum height=1cm, text centered, draw=black]

---

此外，正如 marmot 先生所说，\tikzstyle语法有点令人沮丧，应替换为\tikzset：

\documentclass{article}

\usepackage{tikz}
\usetikzlibrary{shapes.geometric, arrows}

\tikzset{%
  question/.style={rectangle, minimum width=3cm, minimum height=1cm,text centered, draw=black},
% \tikzstyle{question} = [rectangle, minimum width=3cm, minimum height=1cm,text centered, draw=black]
  diagnosis/.style={rectangle, rounded corners, minimum width=3cm, minimum height=1cm, text centered, draw=black},
% \tikzstyle{diagnosis} = [rectangle, rounded corners, minimum width=3cm, minimum height=1cm, text centered, draw=black]
  input/.style={diamond, minimum width=3cm, minimum height=1cm, text centered, draw=black},
% \tikzstyle{input} = [diamond, minimum width=3cm, minimum height=1cm, text centered, draw=black]
  arrow/.style={thick,->,>=stealth}
% \tikzstyle{arrow} = [thick,->,>=stealth]
  }

\begin{document}
\begin{tikzpicture}[node distance=2cm]

\node (in1) [input] {node};
\node (q1) [question, below of=in1] {Matches distractor node?};
\draw [arrow] (in1) -- (q1);

\end{tikzpicture}
\end{document}

我保留了以前的语法以便进行比较。