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/* Order of Operations Parser
#Filename: order_of_operations_parser.php
#Last updated: See http://git.sugarlabs.org/projects/teacher-reporting
*** FIELD REFERENCE ***
MAC= $1 tok[0]
NAME= $2 tok[1]
OPERATION= $3 tok[2]
SUCCESS= $4 tok[3]
test2
*/
<?php
echo "Student, Only +, Contains +, Only -, Contains -, Only *, Contains *, Only /, Contains /, Understands OoO?"
/*Open the data file for reading - mysql calls shortly */
$fp = fopen("./Student.dat", "r");
if(!$fp) die ("Cannot open the file");
//Break Each line of the file into its own array element - will have to parse each array element to obtain fields
$lines = file($fp);
$numWords = str_word_count($fp);
//Will always be a multiple of four so $NumRecords will be $numWords/4
$numRecords = $numWords / 4;
//Our Associative array Will also be in sequence 1,5,9,13.. + 4 etc
//Need to tokenize each line and choose appropriate elements ($1)
//This is just to fill the array with Variables. Next we will go through the same process for the remaining fields
// Perform the order of operations logic on them add them to additional associate arrays with various meanings
// For Example addition_correct[] and o_addition_correct[]
for (i=0;i<=$numRecords;i++)
{
$tok = strtok($lines, " ");
/*
Because in the end statement we will have to loop through one of the arrays, which will be localized according
#to specific aritmetic operations (- + / *). We need to account for the fact that some students may not answer a
#question with one of these operations, and if we looped through that particular operation, we would not represent
#that student in any of the logic containted within that loop in the END{} statment. Therefore an associative array
#which absolutely, accounts for any student, contained in the .dat, the CLASS[] array.
$Class[tok[0]];
*/
while ($tok !== false)
{
$Class[tok[0]];
}
}
//in this loop we will cycle through each line of the .dat file and analyze the third field (or token)
// so for instance $3 in token form is tok[2]
for (i=0;i<=$numRecords;i++)
{
$tok = strtok($lines, " ");
while ($tok !== false)
{
$equation = $tok[2];
/**********REGULAR EXPRESSION KEY*********/
//Addition = /\+/
//Subtraction = /[0-9]\-[0-9]/
//Division = /\//
//Multiplication= /\*/
// ` ********************************ADDITION*************************
//contains addition
$regexp = "/\+/";
if (preg_match($regexp, $equation)) //if ($tok[2] contains TODO check for correctness
{
$contains_addition[tok[0]]++; //but is not correct
if ($tok[3] = "1") //is it also correct? put it in a different associative array with the same key
{
$contains_addition_correct[tok[0]]++;
}
}
//using if-structure because an else if would not encompass compound(contains more than one operation) operations
//Now we need to determine if a particular question contained ONLY a particular operation
//Matches operations with ONLY ADDITION
if (preg_match($regexp, $equation) && !preg_match("-", $equation), && !preg_match("\/", $equation), && !preg_match("*", $equation))
{
$only_addition[tok[2]]++
if ($tok[3] = "1") //is it also correct? put it in a different associative array with the same key
{
$only_addition_correct[tok[0]]++;
}
}
//******************************************SUBTRACTION********************************
//TODO: account for negative numbers
//contains subtraction
$regexp = "/[0-9]\-[0-9]/"; //NOTE:operation remains the same, as we are checking it four times for each operation
if (preg_match($regexp, $equation))
{
$contains_subtraction[tok[0]]++;
if ($tok[3] = "1")
{
$contains_subtraction_correct[tok[0]]++;
}
}
//Matches equations with ONLY SUBTRACTION
if (preg_match($regexp, $equation) && !preg_match("+", $equation) && !preg_match("\/", $equation) && !preg_match("*", $equation))
{
$only_subtraction[tok[2]]++
if ($tok[3] = "1") //is it also correct? put it in a different associative array with the same key
{
$only_subtraction_correct[tok[0]]++;
}
}
//******************************DIVISION********************************
//contains division
$regexp = "/\//"
if (preg_match($regexp, $equation))
{
$contains_division[tok[0]]++
if ($tok[3] = "1")
{
$contains_division_correct[tok[0]]++
}
}
//Matches equations with ONLY DIVISION
if (preg_match($regexp, $equation) && !preg_match("+", $equation) && !preg_match("-", $equation) && !preg_match("*", $equation))
{
$only_division[tok[2]]++
if ($tok[3] = "1") //is it also correct? put it in a different associative array with the same key
{
$only_division_correct[tok[0]]++;
}
}
//**************************************Multiplication*************************
$regexp = "/\*/" //Matches equations with only multiplication
if (preg_match($regexp, $equation))
{
$contains_multiplication[tok[0]]++;
if ($tok[3] = "1")
{
$contains_multiplication_correct[tok[0]]++;
}
}
//Matches equations with ONLY Multiplication
if (preg_match($regexp, $equation) && !preg_match("+", $equation) && !preg_match("\/", $equation) && !preg_match("-", $equation))
{
$only_multiplication[tok[2]]++;
if ($tok[3] = "1") //is it also correct? put it in a different associative array with the same key
{
$only_multiplication_correct[tok[0]]++;
}
}
}
//**********************************************COMPOUND EQUATIONS*********************************
// can simply not use regexp but replace with a literal reg expression
if(preg_match("/\+/", $equation) && (preg_match("/[0-9]\-[0-9]/", $equation) || preg_match("/\//", $equation) || preg_match("/\*/", $equation)))
{
$compound[tok[0]]++; //NOTE compound_incorrect is implicit
if ($tok[3] = "1") //if correct
{
$compound_correct[tok[0]]++;
}
}
elseif( (preg_match("/[0-9]\-[0-9]/", $equation)) && (preg_match("/\+/", $equation) || preg_match("/\//", $equation) || preg_match("/\*/", $equation)))
{
$compound[tok[0]]++;
if ($tok[3] = "1") //if correct
{
$compound_correct[tok[0]]++;
}
}
elseif(preg_match($"/\//", $equation) && (preg_match("/\+/", $equation) || preg_match("/[0-9]\-[0-9]/", $equation) || preg_match("/\*/", $equation)))
{
$compound[tok[0]]++;
if ($tok[3] = "1") //if correct
{
$compound_correct[tok[0]]++;
}
}
elseif( (preg_match($"/\*/", $equation)) && (preg_match("/\+/", $equation) || preg_match("/[0-9]\-[0-9]/", $equation) || preg_match("/\//", $equation)))
{
$compound[tok[0]]++;
if ($tok[3] = "1") //if correct
{
$compound_correct[tok[0]]++;
}
}
else
{
$non_compound[tok[0]++;
if ($tok[3] = "1") //if correct
{
$non_compound_correct[tok[0]]++;
}
}
}
/*
# A student doesnt understand order of operations if their is a greater than 20% difference in between compound
# operations and single operation instructions, but only if lower on the compound instruction side.
# or if they get less than 70% on compounds, because getting a 51% on compounds and 70% on non compounds doesnt satisfy
# understaning of OoO
*/
foreach ($Class as $student)
{
if ( ( ($non_compound_correct[$student] / $non_compound[$student]) - ($compound_correct[$student] / $compound[$student]) > .2 ) || ( ($non_compound_correct[$student] / $non_compound[$student]) ) < .7)
{
$understands= "no"
}
else
{
$understands= "yes"
}
}
//printing formatted data
sprintf("%-11s%-8s%-11s%-8s%-11s%-8s%-11s%-8s%-11s%-11s\n", $student, int($only_addition_correct[$student]*100/$only_addition[$student]), int($contains_addition_correct[$student]*100/$contains_addition[$student]), int($only_subtraction_correct[$student]*100/$only_subtraction[$student]), int($contains_subtraction_correct[$student]*100/$contains_subtraction[$student]), int($only_multiplication_correct[$student]*100/$only_multiplication[$student]), int($contains_multiplication_correct[$student]*100/$contains_multiplication[$student]), int($only_division_correct[$student]*100/$only_division[$student]), int($contains_division_correct[$student]*100/$contains_division[$student]), $understands)
/*close the file? */
fclose($fp);
?>
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