JavaScript/hw3part1.html at master · marbleindex/JavaScript · GitHub

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<!DOCTYPE html>
<html lang="en">
   <head>
      <!--Kristian Reyes 9/12/2020 -->
      <title>CNIT 133 Homework 3</title>
      <meta charset="utf-8">
      <meta name="description" content="homework 3 for CCSF CNIT 133">
      <meta name="keywords" content="HTML, CSS, Javascript, CCSF, Student">
      <meta name="author" content="Kristian Reyes">
      <meta name="viewport" content="width=device-width, initial-scale=1">
      <!--bootstrap    -->
      <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css">
      <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"
         ></script>
      <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
      <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>
      <!--bootstrap    -->
      <script>

         function finalGrade()
         {
         event.preventDefault();

         document.getElementById("inputErr").innerHTML = "";


         var hwAvg, midExam, finalExam, participation, finalAverage;

         hwAvg = document.getElementById("hwAvg").value;
         midExam = document.getElementById("midExam").value;
         finalExam = document.getElementById("finalExam").value;
         participation = document.getElementById("participation").value;

         var errMsg = "<span style='font-weight: bold; color: red; font-size: 20px;'> Input is invalid. Only enter positive integers between 0 and 100. </span>";

           if (isNaN(hwAvg) || isNaN(midExam) || isNaN(finalExam) || isNaN(participation) || hwAvg < 0 || midExam < 0 || finalExam < 0 || participation < 0 || hwAvg > 100|| midExam > 100 || finalExam > 100 || participation > 100)

         document.getElementById("inputErr").innerHTML = errMsg;

           else
         {
         finalAverage = (.5 * hwAvg) + (.2 * midExam) + (.2 * finalExam) + (.1 * participation);


         switch (true)

         {
               // Display the final grade based on final average

               case (finalAverage >= 90):
               document.getElementById("final").innerHTML = (finalAverage + ". " + "The student has a grade of A.");

               break;

               case (finalAverage >= 80):
               document.getElementById("final").innerHTML = (finalAverage + ". " + "The student has a grade of B.");
               break;

               case (finalAverage >= 70):
               document.getElementById("final").innerHTML = (finalAverage + ". " + "The student has a grade of C.");
               break;

               case (finalAverage >= 60):
               document.getElementById("final").innerHTML = (finalAverage + ". " + "The student has a grade of D.");
               break;

               case (finalAverage <= 59):
               document.getElementById("final").innerHTML = (finalAverage + ". " + "The student has a grade of F. Student must retake the course.");
               break;
         }
         }}

      </script>
   <body>
      <main class="grid">
         <header  class="grid-area grid-area-1">
            <h2> Homework 3 - Part 1 </h2>
         </header>
         <nav class="grid-area grid-area-2">
            <ul>
               <li>
                  <a href="homework3.html" title="CNIT 133 - HW 3">
                  Return to CNIT 133 Homework 3 - Functions
                  </a>
               </li>
            </ul>
         </nav>
         <section class="grid-area grid-area-3">
            <h1> HW 3 - Part 1 </h1>
            <h2> Student Grades </h2>
            <p> Please enter student scores below.</p>
            <form name="myform">
            <table>
               <tr>
                  <td>Homework Average Score:</td>
                  <td><input id="hwAvg" type="number" ></td>
               </tr>
               <tr>
                  <td>Mid-term Exam Score:</td>
                  <td><input id="midExam" type="number" ></td>
               </tr>
               <tr>
                  <td>Final Exam Score:</td>
                  <td><input id="finalExam" type="number" ></td>
               </tr>
               <tr>
                  <td>Participation Score:</td>
                  <td><input id="participation" type="number" ></td>
               </tr>
            </table>
            </form>
            <br>
            <div id ="inputErr"></div>
            <br>
            <br>
            <p> Submit results to calculate student's final average.</p>
            <button onclick="finalGrade()">Submit</button>
            <br>
            <p> The student's final average is: </p>
            <p>
               <input type="text" id="final"  size="60">
            </p>
         </section>
         <footer class="grid-area grid-area-4">
            <p>
               &#169; 2020 Kristian Reyes
            </p>
         </footer>
      </main>
   </body>
</html>