如何打印涉及计数器值的计算结果？

Question

我设置了计数器的值ga，并想打印涉及其最终值的数字计算结果。

我应该用什么来代替\dots？

\begin{tikzpicture}[scale=0.7]
\newcounter{ga}
 \setcounter{ga}{0}

 \tikzmath{\u1 = 10; \x1 =10; }
 \draw[double, rounded corners, purple, fill=yellow!3] (0,0) rectangle (\x1+1,\u1+1);
   \foreach \u in {1,...,\u1}{
    \foreach \x in {1,...,\x1}{
      \pgfmathrandominteger{\a}{1}{6}
      \pgfmathrandominteger{\b}{1}{6}
      \ifthenelse{\a<4 \AND \b<4 \AND \NOT \a =\b}
        {\node[blue,draw,circle,font=\scriptsize] at (\x,\u) {sì} \pgfextra{\stepcounter{ga}};}
        {\node[font=\scriptsize] at (\x,\u) {no};}
    }
  }
 % \def\gga{\pgfextra{\stepcounter{ga}}}
  \pgfmathtruncatemacro{\pr}{\u1*\x1}
 %\pgfmathtruncatemacro{\u}{\gga/\pr}
  \node[font=\normalsize] at (\x1/2,-1) {$frequenza=\dfrac{\thega}{\pr}= \dots \mbox {\it in  forma decimale}$};
\end{tikzpicture}

Answer 1

你的意思是“如何计算分数以小数形式显示”？

\documentclass{article}
\usepackage{ifthen,tikz,amsmath}
\usetikzlibrary{math}

\newcounter{ga}

\begin{document}

\begin{tikzpicture}[scale=0.7]
  \tikzmath{\u1 = 10; \x1 =10; }
  \setcounter{ga}{0}
  \draw[double, rounded corners, purple, fill=yellow!3] (0,0) rectangle (\x1+1,\u1+1);
  \foreach \u in {1,...,\u1}{
    \foreach \x in {1,...,\x1}{
      \pgfmathrandominteger{\a}{1}{6}
      \pgfmathrandominteger{\b}{1}{6}
      \ifthenelse{\a<4 \AND \b<4 \AND \NOT \a =\b}
        {\node[blue,draw,circle,font=\scriptsize] at (\x,\u) {sì}; \stepcounter{ga}}
        {\node[font=\scriptsize] at (\x,\u) {no};}
    }
  }
  \pgfmathtruncatemacro{\pr}{\u1*\x1}
  \node[font=\normalsize] at (\x1/2,-1) {%
    $\mathit{frequenza}=\dfrac{\thega}{\pr}= \fpeval{\thega/\pr}$ \textit{in  forma decimale}%
  };
\end{tikzpicture}

\end{document}

您可能需要\fpeval{round(\thega/\pr,2)}（或者您要求的最大小数位数，而不是 2）。