Question

In: Computer Science

Write a defining table and a computer program that computes and outputs the volume of a...

Write a defining table and a computer program that computes and outputs the volume of a torus with inner radius a and outer radius b. A doughnut is an example of a torus. Your program must read the inner radius and outer radius from two text fields and display the volume in a div. The formula for the volume of a torus is

v =  π2(a + b)(a - b)2

4

where v is the volume, π is the constant pi, a is the inner radius, and b is the outer radius. Your program should allow a user to enter real numbers such as 7.54. If you wish, you may use the following HTML code in your program.

<!DOCTYPE HTML>
<html lang="en-us">
<head>
<meta charset="utf-8">
<title>Volume of a Torus</title>
<script>

// Your JavaScript function belongs here.

</script>
</head>

<body>
    <h1>Volume of a Torus</h1>
    Inner radius <input type="text" id="inner"><br>
    Outer radius <input type="text" id="outer"><br>
    <button type="button" onclick="computeVolume()">Volume</button><br>
    Volume <div id="volume"></div>
</body>
</html>
Test Cases
Inputs Output
inner outer
2.8 3.1 1.31
14.6 17.1 488.85

Solutions

Expert Solution

<!DOCTYPE HTML>
<html lang="en-us">
<head>
    <meta charset="utf-8">
    <title>Volume of a Torus</title>
    <script>
        function computeVolume() {
            var a = Number(document.getElementById("outer").value);
            var b = Number(document.getElementById("inner").value);
            var vol = Math.pow(Math.PI, 2) * (a + b) * Math.pow(a - b, 2) / 4;
            document.getElementById("volume").innerHTML = vol.toFixed(2);
        }
    </script>
</head>

<body>
<h1>Volume of a Torus</h1>
Inner radius <input type="text" id="inner"><br>
Outer radius <input type="text" id="outer"><br>
<button type="button" onclick="computeVolume()">Volume</button>
<br>
Volume
<div id="volume"></div>
</body>
</html>

venereology answered 7 months ago
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