Latex TikZ：节点形状

Question 1

好吧，我会将我的评论转化为可能的解决方案之一......

看看以下内容是否是您所寻找的：

代码（最小工作示例：MWE）——我借此机会将过时的节点样式更改\tikzstyle为选项tikzpicture，纠正节点定位的错误语法并添加 TikZ 库，chains从而使代码稍微缩短——是：

\documentclass[tikz,
               border=3mm]{standalone}
\usetikzlibrary{arrows, chains, positioning, shapes.geometric, shapes.symbols}

\begin{document}
    \begin{tikzpicture}[
   node distance = 1cm and 2cm,
     start chain = going below,
     base/.style = {draw=black, minimum width=3cm, minimum height=1cm,
                    align=center, on chain},
 decision/.style = {diamond, base, fill=green!30},
     list/.style = {tape, tape bend top=none, base},%<-- new    
 myarrows/.style = {-stealth, thick},% <-- added on request in comment
  process/.style = {rectangle, base},
startstop/.style = {rectangle, base, rounded corners, fill=red!30},
                    ]
\node (start) [startstop]   {Start MCL};
\node (pro1)  [process]     {Process};
\node (pro3)  [list]        {List ?};
\node (dec1)  [decision,below right=of pro3] {Stable?};
\node (stop)  [startstop, right=of dec1]     {Stop};
%
\draw [->] (start) -- (pro1);
\draw [->] (pro1) -- (pro3);
\draw [->] (pro3) |- (dec1);
\draw [->] (dec1) -- node[anchor=south] {no} (stop);
\draw [->] (dec1) |- node[anchor=west] {yes} (pro1);
    \end{tikzpicture}
\end{document}

由于我没弄清楚你喜欢哪里有新的形状，我用它替换了第二个“流程”节点，并在内容中写了“列表”。

附录（1）： 您可以将任何新样式添加到现有样式中，例如myarrows：

\myarrows/.style = {-stealth, thick},

您还可以将所有本地定义的样式收集\tikzset如下：

\tikzset{%
     base/.style = {draw=black, minimum width=3cm, minimum height=1cm,
                    align=center, on chain},
 decision/.style = {diamond, base, fill=green!30},
     list/.style = {tape, tape bend top=none, base},%<-- new
 myarrows/.style = {-stealth, thick},% <-- added on request in comment
  process/.style = {rectangle, base},
startstop/.style = {rectangle, base, rounded corners, fill=red!30},
    }

并将其放在前言中。在这种情况下，它可用于所有 TikZ 图片。在这种情况下，完整的 MWE 是：

\documentclass[tikz,
               border=5mm]{standalone}
\usetikzlibrary{arrows, chains, positioning, shapes.geometric, shapes.symbols}

\tikzset{%
     base/.style = {draw=black, minimum width=3cm, minimum height=1cm,
                    align=center, on chain},
 decision/.style = {diamond, base, fill=green!30},
     list/.style = {tape, tape bend top=none, base},%<-- new
 myarrows/.style = {-stealth, thick},% <-- added on request in comment
  process/.style = {rectangle, base},
startstop/.style = {rectangle, base, rounded corners, fill=red!30},
    }
\begin{document}
    \begin{tikzpicture}[
   node distance = 1cm and 2cm,
     start chain = going below,
                    ]
\node (start) [startstop]   {Start MCL};
\node (pro1)  [process]     {Process};
\node (pro3)  [list]        {List ?};
\node (dec1)  [decision,below right=of pro3] {Stable?};
\node (stop)  [startstop, right=of dec1]     {Stop};
%
\draw[myarrows] (start) edge (pro1)
                (pro1)  edge (pro3)
%
                (dec1)  to  node[anchor=south] {no} (stop);
\draw [myarrows] (pro3) |- (dec1);
\draw [myarrows] (dec1) |- node[anchor=west] {yes} (pro1);
    \end{tikzpicture}
\end{document}

这个 MWE 给出的结果与（补充）第一个 MWE 相同。

附录（2）： 相反，myarrows您可以定义样式（在 TikZ 图片选项中）：

every path/.style = {-stealth, thick}

（因为图中的所有线都以箭头结尾）并且对于连接线只需写入：

\draw (start) edge (pro1)
      (pro1)  edge (pro3)
%
      (dec1)  to  node[anchor=south] {no} (stop);
\draw (pro3) |- (dec1);
\draw (dec1) |- node[anchor=west] {yes} (pro1);

Answer