I wrote this program to ask the teacher to give the prelim, midterm, and final grade of the student, and then the program will compute the average of the student and display the result. I am using PHP as my programming language.

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Program Listing
index.php

<!doctype html>
<html>
 <head>
  <title>Subject Grade Solver in PHP</title>
 </head>
 <body>
  <form method="POST" action="">  
   <h2>PHP Example 3.4</h2>
<?php
$ave=0;
$remark=$pre=$mid=$end="";
if(isset($_POST['compute'])){
 $pre=$_POST['prelim'];
 $mid=$_POST['midterm'];
 $end=$_POST['endterm'];
 
 $ave=($pre+$mid+$end)/3;
 
 if($ave < 75){
  $remark="Failed";
 }
 else if($ave >= 75 and $ave <= 80){
  $remark="Below Average";
 }
 else if($ave > 80 and $ave <= 85){
  $remark="Average";
 }
 else if($ave > 85 and $ave <= 90){
  $remark="Above Average";
 }
 else if($ave > 90){
  $remark="Excellent";
 }
}
?>
   <p>Prelim Grade: <input type="text" name="prelim" value="<?=$pre;?>"></p>
   <p>Midterm Grade: <input type="text" name="midterm" value="<?=$mid;?>"></p>
   <p>Endterm Grade: <input type="text" name="endterm" value="<?=$end;?>"></p>
   <p><input type="submit" name="compute" value="Compute"></p>
   <p>
    Average Grade: <?=number_format($ave, 2);?><br/>
    Remark: <?=$remark;?><br/>
   </p>
  </form>
 </body>

</html>
Posted by Jake Rodriguez

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