Crthuky

I want to store an answer key for an exam and then automatically move the multiple choice answer choices around for each question match its predetermined answer. (I need to conform my multiple choice exam to a predetermined answer key in order to use these cool scratch-off scantrons called "IF-AT" scantrons).

I have a partial solution (see MWE at bottom) based one three steps.

1. Store the answers for the exam in an array using arrayjob.sty, 1234 meaning ABCD respectively. For example, usepackagearrayjob newarrayanswerkey readarrayanswerkey3&4 records the answer to Q1 as C and the answer to Q2 as D.


2. Then arabicquestion gives you the question number, and so answerkey(arabicquestion) gives you that previously stored answer for that question number.


3. Use ifthenelse to execute different behavior based on that number answerkey(arabicquestion).

However, I can't figure out how to get ifthenelse to read answerkey(arabicquestion). In other words,

ifthenelseequal1answerkey(arabicquestion)some code

doesn't work.
I think it's a matter of expanding macros at the right time.

In the MWE below I commented out the code testing arrayjob.sty + ifthen.sty because it fails to compile.

For good measure, I also tried replacing the two packages with pgfmath.sty and fp.sty respectively (Qs 6, 7, 8 in MWE below), but no combination compiles.

documentclassexam
usepackageifthen, fp, arrayjob, pgfmath
newarrayanswerkey %arrayjob
readarrayanswerkey4&3&2&1&1&1&1&1
defanswerkeytwo,4,3,2,1,1,1,1,1 %pgfmath
begindocument
beginquestions
question testing arrayjob...
 answerkey(arabicquestion)
question testing pgf...
 pgfmathparseanswerkeytwo[arabicquestion]pgfmathresult
question testing ifthen...
 ifthenelseequal 2 2itbetrueitbefalse.
question testing fp...
 FPifeq 1 1 itbetrueelse itbefalsefi.
question testing arrayjob + ifthen... (should print itbetrue)
 %ifthenelseequal 1 
 % answerkey(arabicquestion)
 % itbetrueitbefalse.
question testing arrayjob + fp... (should print itbetrue)
 %FPifeq 1 
 % answerkeyone(arabicquestion)
 % itbetrue else itbefalse fi.
question testing pgfmath + ifthen... (should print itbetrue)
 %ifthenelseequal 1 
 % pgfmathparseanswerkeytwo[arabicquestion]pgfmathresult
 % itbetrueitbefalse.
question testing pgfmath + fp... (should print itbetrue)
 %FPifeq 1 
 % pgfmathparseanswerkeytwo[arabicquestion]pgfmathresult
 % itbetrueelse itbefalsefi.
endquestions
enddocument

So how do I get answerkey(arabicquestion)} to expand early enough for ifthenelseequal1answerkey(arabicquestion)} to work?