如何在Tex中读取多个文件并将内容写入单个文件？

Question

我有一个任务，第一步是读取几个单独的文件，然后将内容重新组织到Tex中的一个新文件中。我尝试使用以下命令：

\newwrite\myfile
\immediate\openout\myfile=10solutions.tex 
\def\temp{\Input{inputFile}}
\let\newtxt\temp
\temp
\newtxt
\immediate\write\myfile{\newtxt}
\immediate\closeout\myfile

我可以看到\ temp和\ newtxt的输出正确。但是，当我尝试写入“ myfile”时，它报告以下错误：

! TeX capacity exceeded, sorry [input stack size=5000].
\reserved@a ->\def \reserved@a 
                               *{\@vspacer }\reserved@a 
l.60 \immediate\write\myfile{\newtxt}

If you really absolutely need more capacity,
you can ask a wizard to enlarge me.


Here is how much of TeX's memory you used:
 14143 strings out of 492902
 197654 string characters out of 3140037
 354467 words of memory out of 3000000
 17607 multiletter control sequences out of 15000+200000
 109263 words of font info for 149 fonts, out of 3000000 for 9000
 1141 hyphenation exceptions out of 8191
 5000i,18n,77p,3236b,486s stack positions out of 5000i,500n,10000p,200000b,50000s
!  ==> Fatal error occurred, no output PDF file produced!

它看起来像是无限递归，但我不知道它从何而来。预先感谢您的帮助。