# 系统识别功能在windows下无法通过编译 因为在不同操作系统中字体文件名不一样，设置字体时根据不同系统有不同写法。 自己写cls的时候想根据不同系统使用不同的字体设置代码。在cls文件写了： ```Tex %在spaexp.cls文件中 %Identifications \NeedsTeXFormat{LaTeX2e}[1995/12/01] \ProvidesClass{spaexp} [2020/02/21 SPA physics experiment template non-official edition v1.0 ] %% Loading Class \LoadClass[a4paper,no-math,zihao = -4]{ctexart} %%%设置字体 \ctexset{ punct = banjiao%使用半角标点符号 } \newif\ifmcm@mac %（代码参考https://github.com/OsbertWang/GMCMthesis 这个是OsbertWang，修正支持让各个系统自适应支持近似字体。) \newif\ifmcm@windows % 简单设置会有 warning， 待完善吧。 % \newif\ifmcm@fandol \@ifclasslater{ctexart}{}{ \newcommand\mcm@strifeq{\csname str_if_eq_x:nnTF\endcsname} \newcommand\mcm@fontset{\csname g__ctex_fontset_tl\endcsname} \mcm@strifeq{\mcm@fontset}{mac}{\mcm@mactrue}{} \mcm@strifeq{\mcm@fontset}{windows}{\mcm@windowstrue}{} % \mcm@strifeq{\mcm@fontset}{fandol}{\mcm@fandoltrue}{} }{ \mcm@windowstrue } \setmainfont{Times New Roman} \setsansfont{Arial} \ifmcm@mac \setmonofont[Scale=MatchLowercase]{Menlo} \setCJKmainfont[BoldFont = {Songti SC Black}]{Songti SC} %MacOS: 中文字体使用宋体 \else \ifmcm@windows \setmonofont[Scale=MatchLowercase]{Courier New} \setCJKmainfont{simsun.ttc} %Windows: 中文字体使用宋体 \fi \fi ``` ```Tex %在a.tex文件中 \documentclass{spaexp} \begin{document} hello \end{document} ``` 在Windows下使用此模版进行编译时出现编译不通过。 出现报错（报错只截取了我认为有关的部分） ```log File: ctex.cfg 2019/05/29 v2.4.16 Configuration file (CTEX) ) ./spaexp.cls:27: Undefined control sequence. \LaTeX3 error: '\str_if_eq_x:nnTF' deprecated on 2020-01-01. Use... l.27 } The control sequence at the end of the top line of your error message was never \def'ed. If you have misspelled it (e.g., `\hobx'), type `I' and the correct spelling (e.g., `I\hbox'). Otherwise just continue, and I'll forget about whatever was undefined. ./spaexp.cls:27: LaTeX Error: Missing \begin{document}. See the LaTeX manual or LaTeX Companion for explanation. Type H for immediate help. ... l.27 } You're in trouble here. Try typing to proceed. If that doesn't work, type X to quit. ./spaexp.cls:27: Undefined control sequence. \LaTeX3 error: '\str_if_eq_x:nnTF' deprecated on 2020-01-01. Use... l.27 } The control sequence at the end of the top line of your error message was never \def'ed. If you have misspelled it (e.g., `\hobx'), type `I' and the correct spelling (e.g., `I\hbox'). Otherwise just continue, and I'll forget about whatever was undefined. ``` 这种情况在Macox中不会出现，请问需要怎么处理呢？