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{{historical}}
<p style="font-size: 120%;font-weight:bold">This problem has been replaced with [https://openwebwork.github.io/pg-docs/sample-problems/problem-techniques/AnyAnswerMarkedCorrect.html a newer version of this problem]</p>
<h2>Any Answer Marked Correct</h2>
<h2>Any Answer Marked Correct</h2>


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<p style="background-color:#eeeeee;border:black solid 1px;padding:3px;">
<p style="background-color:#eeeeee;border:black solid 1px;padding:3px;">
<em>This PG code shows how to mark any answer a student submits as correct.</em>
<em>This PG code shows how to mark any answer a student submits as correct.
There are, as usual, many ways to do this; we show two here, one using a
[[CustomAnswerCheckers|custom answer checker]], and one using a special
answer checker that marks any answer correct.</em>
</p>
</p>


<p style="text-align:center;">
<p style="text-align:center;">
[[IndexOfProblemTechniques|Problem Techniques Index]]
[[Problem_Techniques|Problem Techniques Index]]
</p>
</p>
<strong>With the Special Answer Checker</strong>


<table cellspacing="0" cellpadding="2" border="0">
<table cellspacing="0" cellpadding="2" border="0">
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<pre>
<pre>
Context("Numeric");
Context("Numeric");
Context()->variables->are(x=>"Real",y=>"Real",u=>"Real");


$a = random(2,9,1);
$a = random(2,9,1);
Line 68: Line 75:
Context()->texStrings;
Context()->texStrings;
BEGIN_TEXT
BEGIN_TEXT
Enter anything, e.g. \($a\) and it will be marked correct:
Enter anything, e.g. \($a\) and
it will be marked correct:
\{ans_rule(10) \}.
\{ans_rule(10) \}.


Line 98: Line 106:
<p>
<p>
<b>Answer Evaluation:</b>
<b>Answer Evaluation:</b>
We use the <code>ANS(auto_right("All answers are marked correct"));</code> routine to evaluate the answer.  The phrase in quotes (which can be empty) is displayed when "Show correct answers" is checked.  See [http://webwork.maa.org/pod/pg_TRUNK/macros/PGasu.pl.html PGasu.pl.html] for more options and details.
We use the <code>ANS(auto_right("All answers are marked correct"));</code> routine to evaluate the answer.  The phrase in quotes (which can be empty) is displayed when "Show correct answers" is checked.  See [http://webwork.maa.org/pod/pg/macros/PGasu.html PGasu.pl] for more options and details.
</p>
</p>
</td>
</td>
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</table>
</table>


<strong>With a Custom Checker</strong>
<table cellspacing="0" cellpadding="2" border="0">
<tr valign="top">
<th> PG problem file </th>
<th> Explanation </th>
</tr>
<!-- Load specialized macro files  section -->
<tr valign="top">
<td style="background-color:#ddffdd;border:black 1px dashed;">
<pre>
DOCUMENT();
loadMacros(
"PGstandard.pl",
"MathObjects.pl",
);
TEXT(beginproblem());
</pre>
</td>
<td style="background-color:#ccffcc;padding:7px;">
<p>
<b>Initialization:</b>
No additions are needed to the initialization section of the file.
</p>
</td>
</tr>
<!-- Setup section -->
<tr valign="top">
<td style="background-color:#ffffdd;border:black 1px dashed;">
<pre>
Context("Numeric");
$a = Compute(random(2,9,1));
</pre>
</td>
<td style="background-color:#ffffcc;padding:7px;">
<p>
<b>Setup:</b>
Everything is as usual.  In this case we are going to need a MathObject to do the answer checking, so create one here.
</p>
</td>
</tr>
<!-- Question text section -->
<tr valign="top">
<td style="background-color:#ffdddd;border:black 1px dashed;">
<pre>
Context()->texStrings;
BEGIN_TEXT
Enter any number, e.g. \($a\) and it
will be marked correct:
\{ans_rule(10) \}.
END_TEXT
Context()->normalStrings;
</pre>
<td style="background-color:#ffcccc;padding:7px;">
<p>
<b>Main Text:</b>
The text section is as we'd expect.
</p>
</td>
</tr>
<!-- Answer section -->
<tr valign="top">
<td style="background-color:#eeddff;border:black 1px dashed;">
<pre>
$showPartialCorrectAnswers = 1;
ANS( $a-&gt;cmp( checker=&gt;sub {
    my ( $cor, $stu, $ans ) = @_;
    return 1; } ) );
ENDDOCUMENT();
</pre>
<td style="background-color:#eeccff;padding:7px;">
<p>
<b>Answer Evaluation:</b>
We use our MathObject to check the answer, but specify a [[CustomAnswerCheckers|custom answer checker]] to do the actual checking.  Here we return 1 for any answer, so anything will be marked correct.  One note about this method: because our MathObject is a real number, it will require that the student's answer be a real number to be marked correct.  We could accept any formula or number by specifying <code>$a = Formula(random(2,9,1))</code> above.
</p>
<p>
<i>It should also be possible to turn off type checking---we need to document this.</i>
</p>
</td>
</tr>
</table>
<p style="text-align:center;">
<p style="text-align:center;">
[[IndexOfProblemTechniques|Problem Techniques Index]]
[[Problem_Techniques|Problem Techniques Index]]
</p>
</p>


[[Category:Problem Techniques]]
[[Category:Problem Techniques]]




<ul>
<ul>
<li>POD documentation: [http://webwork.maa.org/pod/pg_TRUNK/macros/PGasu.pl.html PGasu.pl.html]</li>
<li>POD documentation: [http://webwork.maa.org/pod/pg/macros/PGasu.html PGasu.pl]</li>
<li>PG macro: [http://webwork.maa.org/viewvc/system/trunk/pg/macros/PGasu.pl?view=log PGasu.pl]</li>
<li>PG macro: [http://webwork.maa.org/viewvc/system/trunk/pg/macros/PGasu.pl?view=log PGasu.pl]</li>
</ul>
</ul>

Latest revision as of 20:54, 20 June 2023

This article has been retained as a historical document. It is not up-to-date and the formatting may be lacking. Use the information herein with caution.

This problem has been replaced with a newer version of this problem

Any Answer Marked Correct


This PG code shows how to mark any answer a student submits as correct. There are, as usual, many ways to do this; we show two here, one using a custom answer checker, and one using a special answer checker that marks any answer correct.

Problem Techniques Index

With the Special Answer Checker

PG problem file Explanation 
DOCUMENT();
loadMacros(
"PGstandard.pl",
"MathObjects.pl",
"PGasu.pl",
"PGcourse.pl",
);
TEXT(beginproblem());

Initialization: We need to include the macros file PGasu.pl, which provides an answer checker that marks any answer submitted as correct. 

Context("Numeric");

$a = random(2,9,1);

Setup: Everything is as usual. 

Context()->texStrings;
BEGIN_TEXT
Enter anything, e.g. \($a\) and
it will be marked correct:
\{ans_rule(10) \}.


END_TEXT
Context()->normalStrings;

Main Text: The text section is as we'd expect. 

$showPartialCorrectAnswers = 1;

ANS(auto_right("All answers are marked correct"));

ENDDOCUMENT();

Answer Evaluation: We use the ANS(auto_right("All answers are marked correct")); routine to evaluate the answer. The phrase in quotes (which can be empty) is displayed when "Show correct answers" is checked. See PGasu.pl for more options and details.

With a Custom Checker

PG problem file Explanation 
DOCUMENT();
loadMacros(
"PGstandard.pl",
"MathObjects.pl",
);
TEXT(beginproblem());

Initialization: No additions are needed to the initialization section of the file. 

Context("Numeric");

$a = Compute(random(2,9,1));

Setup: Everything is as usual. In this case we are going to need a MathObject to do the answer checking, so create one here. 

Context()->texStrings;
BEGIN_TEXT
Enter any number, e.g. \($a\) and it
 will be marked correct:
\{ans_rule(10) \}.


END_TEXT
Context()->normalStrings;

Main Text: The text section is as we'd expect. 

$showPartialCorrectAnswers = 1;

ANS( $a->cmp( checker=>sub {
    my ( $cor, $stu, $ans ) = @_;
    return 1; } ) );

ENDDOCUMENT();

Answer Evaluation: We use our MathObject to check the answer, but specify a custom answer checker to do the actual checking. Here we return 1 for any answer, so anything will be marked correct. One note about this method: because our MathObject is a real number, it will require that the student's answer be a real number to be marked correct. We could accept any formula or number by specifying $a = Formula(random(2,9,1)) above.

It should also be possible to turn off type checking---we need to document this.

Problem Techniques Index


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