I'd like to ask students to enter two different answers for the same equation. For each answer I can check its correctness, but how can I be sure that the two answers are different? In case that matters: I need to do this for two problems; in one case each answer is a single number, in another case each answer is a pair of numbers.
THANKS!
Hi Siman,
To grade two different answers for the same equation in the same problem you may want to use parserMultiAnswer: see http://webwork.maa.org/wiki/MultiAnswerProblems . Something like the following would probably work in this case, given the two answers defined in the variables $ans1 and $ans2.
loadMacros( "parserMultiAnswer.pl" );
...
$check = MultiAnswer( $ans1, $ans2 )->with(
singleResult => 1,
checker => sub {
my ( $correct, $student, $ansHash ) = @_;
my ( $cor1, $cor2 ) = @$correct;
my ( $stu1, $stu2 ) = @$student;
return ( ( $cor1 == $stu1 &&
$cor2 == $stu2 ) ||
( $cor1 == $stu2 &&
$cor2 == $stu1 ) );
} );
If you have the answers being checked in subsequent problems this becomes harder, because it's difficult to find out what the student entered in one problem from within another problem.
Gavin