View of /trunk/webwork2/doc/parser/extensions/7-context.pg

    1 ##########################################################
    2 #
    3 #  Example showing how to switch different contexts
    4 #
    5 
    6 DOCUMENT();        # This should be the first executable line in the problem.
    7 
    8 loadMacros(
    9   "PGbasicmacros.pl",
   10   "PGanswermacros.pl",
   11   "Parser.pl",
   12   "parserTables.pl",
   13 );
   14 
   15 TEXT(beginproblem());
   16 
   17 BEGIN_TEXT
   18 In this problem, we compare formulas in complex and vector contexts.
   19 Note the difference between how ${BTT}i${ETT} is treated in the two contexts.
   20 $PAR
   21 END_TEXT
   22 
   23 ##########################################################
   24 #
   25 #  Use Complex context
   26 #
   27 
   28 Context('Complex');
   29 
   30 BEGIN_TEXT
   31 \{Title("The Complex context:")\}
   32 $PAR
   33 \{ParserTable(
   34    'i',
   35    'Formula("1+3i")',
   36    'Formula("x+3i")',
   37    '1 + 3*i',
   38    '$x + 3*i',
   39    '$z = tan(2*i)',
   40    'Formula("sinh(z)")',
   41    'Formula("3i+4j-k")',
   42    'Formula("3i+4j-k")->eval',
   43    '3*i + 4*j - k',
   44 )\}
   45 $PAR$BR
   46 END_TEXT
   47 
   48 
   49 ##########################################################
   50 #
   51 #  Use Vector context
   52 #
   53 
   54 Context('Vector');
   55 
   56 BEGIN_TEXT
   57 \{Title("The Vector context:")\}
   58 $PAR
   59 \{ParserTable(
   60    'i',
   61    'Formula("1+3i")',
   62    'Formula("x+3i")',
   63    '1 + 3*i',
   64    '$x + 3*i',
   65    '$z = tan(2*i)',
   66    'Formula("sinh(z)")',
   67    'Formula("3i+4j-k")',
   68    'Formula("3i+4j-k")->eval',
   69    '3*i + 4*j - k',
   70 )\}
   71 END_TEXT
   72 
   73 ###########################################################
   74 
   75 ENDDOCUMENT();        # This should be the last executable line in the problem.