我试图在两列代码后添加一个标题。对于两列，parcolumns这是我发现的唯一允许在中间分页的方法，也是我目前最喜欢的方法。使用 minipages 也是可行的，而且看起来要好看得多，除非它在无法跨多页流动时强制使用难看的空白。
无论如何，我的主要问题是 captionof 之后的垂直空间，我试图将其用作两个都列。下面是发生这种情况的一个例子。如何才能恢复正常间距/边距\captionof？
\documentclass{article}
\usepackage{parcolumns}
\usepackage{listings}
\usepackage{caption}
\lstset{
frame=lrtb,
captionpos=b,
}
\begin{document}
An initial paragraph.
\begin{lstlisting}[caption={Insertion sort using swaps}]
for i ← 1 to length(A)
j ← i
while j > 0 and A[j-1] > A[j]
swap A[j] and A[j-1]
j ← j - 1
\end{lstlisting}
A paragraph after lstlistings with normal indentation and vertical spacing.
\begingroup
%\noindent %this would cause extra vertical space before the parcolumns
\begin{parcolumns}[colwidths={1=.48\linewidth}]{2} %colwidths still leaves too much whitespace between columns
\footnotesize
\colchunk[1]{
\begin{lstlisting}
for i ← 1 to length(A)
j ← i
while j > 0 and A[j-1] > A[j]
swap A[j] and A[j-1]
j ← j - 1
\end{lstlisting}
}
\colchunk[2]{
\begin{lstlisting}
for i ← 1 to length(A)
x ← A[i]
j ← i
while j > 0 and A[j-1] > x
A[j] ← A[j-1]
j ← j - 1
A[j] ← x
\end{lstlisting}
}
\end{parcolumns}
\captionof{lstlisting}{Different insertion sorts in parcolumns.}
\endgroup
A paragraph after the caption for the parcolumns environment.
This paragraph is indented due to begingroup/endgroup but still has no vertical space/margin between
it and the caption.
\begingroup
\noindent
\begin{minipage}[t]{.48\textwidth} %t aligns top
\footnotesize
\begin{lstlisting}
for i ← 1 to length(A)
j ← i
while j > 0 and A[j-1] > A[j]
swap A[j] and A[j-1]
j ← j - 1
\end{lstlisting}
\end{minipage}
\hfill
\begin{minipage}[t]{.48\textwidth}
\footnotesize
\begin{lstlisting}
for i ← 1 to length(A)
x ← A[i]
j ← i
while j > 0 and A[j-1] > x
A[j] ← A[j-1]
j ← j - 1
A[j] ← x
\end{lstlisting}
\end{minipage}
\captionof{lstlisting}{Different insertion sorts in minipages.}
\endgroup
A paragraph after the caption for two minipages.
This paragraph is indented due to noindent and begingroup/endgroup but still has no vertical space/margin between
it and the caption.
\end{document}
输出：
（我没有在我的列表上使用框架，所以我希望渲染错误不是问题）
答案1
这是一个更好的方法。由于listings和caption包都对 s 的标题起作用lstlisting，因此最好通过添加来消除列表和其后的文本之间引入的listings间距：belowskip=0pt\lstset
\lstset{
frame=lrtb,
captionpos=b,
belowskip=0pt
}
然后我们通过以下方式设置字幕属性\captionsetup
\captionsetup[lstlisting]{aboveskip=5pt,belowskip=\baselineskip}
这样，字幕前后的间距就相同了。
完整 MWE：
\documentclass{article}
\usepackage{parcolumns}
\usepackage{listings}
\usepackage{caption}
\lstset{
frame=lrtb,
captionpos=b,
belowskip=0pt
}
\captionsetup[lstlisting]{aboveskip=5pt,belowskip=\baselineskip}
\begin{document}
An initial paragraph.
\begin{lstlisting}[caption={Insertion sort using swaps}]
for i ← 1 to length(A)
j ← i
while j > 0 and A[j-1] > A[j]
swap A[j] and A[j-1]
j ← j - 1
\end{lstlisting}
A paragraph after lstlistings with normal indentation and vertical spacing.
\begingroup
%\noindent %this would cause extra vertical space before the parcolumns
\begin{parcolumns}[colwidths={1=.48\linewidth}]{2} %colwidths still leaves too much whitespace between columns
\footnotesize
\colchunk[1]{
\begin{lstlisting}
for i ← 1 to length(A)
j ← i
while j > 0 and A[j-1] > A[j]
swap A[j] and A[j-1]
j ← j - 1
\end{lstlisting}
}
\colchunk[2]{
\begin{lstlisting}
for i ← 1 to length(A)
x ← A[i]
j ← i
while j > 0 and A[j-1] > x
A[j] ← A[j-1]
j ← j - 1
A[j] ← x
\end{lstlisting}
}
\end{parcolumns}
\captionof{lstlisting}{Different insertion sorts in parcolumns.}
\endgroup
A paragraph after the caption for the parcolumns environment.
This paragraph is indented due to begingroup/endgroup but still has no vertical space/margin between
it and the caption.
\begingroup
\noindent
\begin{minipage}[t]{.48\textwidth} %t aligns top
\footnotesize
\begin{lstlisting}
for i ← 1 to length(A)
j ← i
while j > 0 and A[j-1] > A[j]
swap A[j] and A[j-1]
j ← j - 1
\end{lstlisting}
\end{minipage}
\hfill
\begin{minipage}[t]{.48\textwidth}
\footnotesize
\begin{lstlisting}
for i ← 1 to length(A)
x ← A[i]
j ← i
while j > 0 and A[j-1] > x
A[j] ← A[j-1]
j ← j - 1
A[j] ← x
\end{lstlisting}
\end{minipage}
\captionof{lstlisting}{Different insertion sorts in minipages.}
\endgroup
A paragraph after the caption for two minipages.
This paragraph is indented due to noindent and begingroup/endgroup but still has no vertical space/margin between
it and the caption.
\end{document}
输出：
