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PHP

Posted by KnowledgeWoods Consulting
KnowledgeWoods Consulting
5,607 Points

Find sets of values in array whose Sum is equal to some number

I have an array containing the marks of 10 students. I want to calculate the number of sets in which marks of $students equals to maximum marks

1 Answer

Grace Kelly
Grace Kelly
33,990 Points
Grace Kelly
Grace Kelly
33,990 Points

Hi Chetan, This solution uses a very simple associative array to store the marks of the students:

<?php

//set the maximum mark
$maximumMark = 500;

//student marks array
$studentMarks = array(
"Adam" =>  array(80, 90, 50, 20, 100),
"Mary"   =>  array(95, 50, 45, 100, 90),
"Susan" =>  array(100,100,100,100,100),
"Joe"     =>  array(100,100,100,100,100)
);

//set the counter
$count = 0;

//loop through the student marks array
foreach($studentMarks as $studentMark => $mark) {

  //if the total sum of the student's marks matches the maximum mark, add 1 to the counter  
  if(array_sum($mark) === $maximumMark) {
    $count++;
  }
}

//echo out the results
echo "There are " . $count . " students with the maxiumum marks of " . $maximumMark;

?>

As you can see by setting a counter before the loop and adding to it while the loop runs, you can track the number of students that achieved the highest marks, hope this helps!!