當我不想顯示小數點時，每個循環都會顯示小數點

Question

我的程式碼是：

\documentclass[tikz,border=10pt]{standalone}
\begin{document}
\begin{tikzpicture}[timeSlot/.style={draw, rectangle, minimum size =1cm}]
        \foreach [count=\x] [evaluate=\x as \xx using \x-1] \val in {J1, J2}
        {
            \node (node\x) [timeSlot] at (\x,0) {\val};
            \node[above] at (node\x.north west) {\xx};
        }
        \node[above] at (node2.north east) {2};
        \draw[ultra thick] (node1.south west) rectangle (node2.north east);
\end{tikzpicture}
\end{document}

輸出是：

我不想在上面的輸出中出現小數點。我希望它們只是 0,1 和 2。我如何解決它？

Answer 1

在這種情況下，一個簡單的方法就是使用來int()取得整數。

\documentclass[tikz,border=10pt]{standalone}
\begin{document}
\begin{tikzpicture}[timeSlot/.style={draw, rectangle, minimum size =1cm}]
  \foreach [count=\x] [evaluate=\x as \xx using int(\x-1)] \val in {J1, J2}
  {
    \node (node\x) [timeSlot] at (\x,0) {\val};
    \node[above] at (node\x.north west) {\xx};
  }
  \node[above] at (node2.north east) {2};
  \draw[ultra thick] (node1.south west) rectangle (node2.north east);
\end{tikzpicture}
\end{document}

Answer 2

可以foreach簡化並使用整數 ( count=\x)，它不需要任何轉換來避免小數。

\documentclass[tikz,border=10pt]{standalone}
\begin{document}
\begin{tikzpicture}[timeSlot/.style={draw, rectangle, minimum size =1cm}]
        \foreach [count=\x from 0] \val in {J1, J2}
        {
            \node (node\x) [timeSlot] at (\x,0) {\val};
            \node[above] at (node\x.north west) {\x};
        }
        \node[above] at (node1.north east) {2};
        \draw[ultra thick] (node0.south west) rectangle (node1.north east);
\end{tikzpicture}
\end{document}