以表格形式居中显示代码列表

Question

我正在使用 mint 将代码列表插入表格，但相应列中的文本和列表未居中。如何将它们居中？

这是我的表格代码：

\begin{center}
    \begin{tabular}{| c | m{12cm} | m{6cm} | m{6cm} |}
    \hline
    Clone Type & Definition & Sample piece 1 & Sample piece 2 \\ \hline

    1 &
    Identical code fragments except for variations in whitespace (may be also
    variations in layout) and comments. & \begin{minted}
    [
    fontsize=\footnotesize,
    ]
    {c}
    if (a >= b)
    { c = d + b; }
    else c = d - a;
    \end{minted}
    & \begin{minted}
    [
    fontsize=\footnotesize,
    ]
    {c}
    if (a >= b)
    { c = d + b; }
    else c = d - a;
    \end{minted}
    \\ \hline
\end{center}