当我尝试使用\MakeLowercase和fmtcount的不同数字格式命令时，我遇到了各种错误。我主要想摆脱 的第一个版本中的错误消息\printpartnum，但也希望得到有关其他版本的帮助。
\documentclass{memoir}
\usepackage{fmtcount}
\renewcommand*{\partnumfont}{\MakeLowercase}
\renewcommand*{\printpartnum}{\partnumfont \ordinalstringnum{\thepart}}
% TeX STOPPED: Incomplete \ifx; all text was ignored after line 9.
% \renewcommand*{\printpartnum}{\partnumfont \ordinalstring{part}}
% c:\texlive\2021\texmf-dist\tex\latex\memoir\memoir.cls:9: You can't use `\relax' after \the. [ \part{Title}]
% c:\texlive\2021\texmf-dist\tex\latex\memoir\memoir.cls:9: Paragraph ended before \@skipmath was complete. [ \part{Title}]
% \renewcommand*{\printpartnum}{\partnumfont \numberstringnum{\thepart}}
% c:\texlive\2021\texmf-dist\tex\latex\memoir\memoir.cls:9: Missing number, treated as zero. [ \part{Title}]
% c:\texlive\2021\texmf-dist\tex\latex\memoir\memoir.cls:9: Missing = inserted for \ifnum. [ \part{Title}]
% c:\texlive\2021\texmf-dist\tex\latex\memoir\memoir.cls:9: Missing number, treated as zero. [ \part{Title}]
% c:\texlive\2021\texmf-dist\tex\latex\memoir\memoir.cls:9: Missing number, treated as zero. [ \part{Title}]
% c:\texlive\2021\texmf-dist\tex\latex\memoir\memoir.cls:9: Missing = inserted for \ifnum. [ \part{Title}]
% c:\texlive\2021\texmf-dist\tex\latex\memoir\memoir.cls:9: Missing number, treated as zero. [ \part{Title}]
% TeX STOPPED: Incomplete \ifx; all text was ignored after line 9.
% \renewcommand*{\printpartnum}{\partnumfont \numberstring{part}}
% c:\texlive\2021\texmf-dist\tex\latex\memoir\memoir.cls:19: You can't use `\relax' after \the. [ \part{Title}]
% c:\texlive\2021\texmf-dist\tex\latex\memoir\memoir.cls:19: Paragraph ended before \@skipmath was complete. [ \part{Title}]
\begin{document}
\part{Title}
\end{document}
答案1
命令\MakeLowercase是不是字体更改命令：它接受一个参数并尝试对其进行完全扩展。
您传递的第一个代码\ordinalstringnum是\MakeLowercase没有意义的。
第二次尝试也有同样的缺陷：
\renewcommand*{\printpartnum}{\partnumfont \ordinalstring{part}}
您再次传递\ordinalstring，\MakeLowercase这是错误的。
你只需要做
\renewcommand{\printpartnum}{\ordinalstring{part}}
