<html>
<head>
<script type="text/javascript"> window.addEventListener('error', function(event) { var message = JSON.parse(JSON.stringify(event.message)); var source = event.filename; var lineno = event.lineno; var colno = event.colno; var error = event.error; window.parent.postMessage({ type: 'iframeError', details: { message: message, source: source, lineno: lineno, colno: colno, error: error ? error.stack : '' } }, '*'); }); window.addEventListener('unhandledrejection', function(event) { window.parent.postMessage({ type: 'iframePromiseRejection', details: { reason: event.reason } }, '*'); }); </script>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width,initial-scale=1">
<title>Rotary Calculator</title>
<meta name="description" content="A calculator app with an old rotating number entering system like telephones">
<meta name="keywords" content="rotary calculator, old calculator, number entering system">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet"
integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
<link href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet">
<link href="https://fonts.googleapis.com/css?family=Roboto" rel="stylesheet">
<script type="text/javascript">
try {
// App Javascript Goes Here. Place your entire script content inside the try block for error handling.
document.addEventListener("DOMContentLoaded", function() {
// Function to handle rotary number input
function handleNumberInput(number) {
var display = document.getElementById("display");
display.value += number;
}
// Function to clear the display
function clearDisplay() {
var display = document.getElementById("display");
display.value = "";
}
// Function to calculate the result
function calculateResult() {
var display = document.getElementById("display");
var expression = display.value;
try {
var result = eval(expression);
display.value = result;
} catch (error) {
display.value = "Error";
}
}
// Attach event listeners to the number buttons
var numberButtons = document.getElementsByClassName("number-button");
for (var i = 0; i < numberButtons.length; i++) {
numberButtons[i].addEventListener("click", function() {
var number = this.getAttribute("data-number");
handleNumberInput(number);
});
}
// Attach event listener to the clear button
var clearButton = document.getElementById("clear-button");
clearButton.addEventListener("click", clearDisplay);
// Attach event listener to the calculate button
var calculateButton = document.getElementById("calculate-button");
calculateButton.addEventListener("click", calculateResult);
});
} catch (error) {
// This will throw the error to the parent window.
throw error;
}
</script>
<style>
/* App CSS Goes Here */
body {
font-family: 'Roboto', sans-serif;
background-color: #f2f2f2;
}
.container {
max-width: 400px;
margin: 0 auto;
padding: 20px;
background-color: #fff;
border-radius: 10px;
box-shadow: 0px 0px 10px rgba(0,0,0,0.1);
}
.calculator {
display: flex;
flex-wrap: wrap;
justify-content: space-between;
}
.calculator button {
width: 30%;
height: 60px;
margin-bottom: 10px;
font-size: 20px;
color: #fff;
background-color: #4CAF50;
border: none;
border-radius: 5px;
cursor: pointer;
}
.calculator button:hover {
background-color: #45a049;
}
.calculator button:active {
background-color: #3e8e41;
}
.display {
width: 100%;
height: 60px;
margin-bottom: 10px;
padding: 10px;
font-size: 24px;
color: #333;
background-color: #f2f2f2;
border: none;
border-radius: 5px;
text-align: right;
}
</style>
<link rel="canonical" href="https://calculator.tools/app/rotary-calculator-1164/">
<meta charset="utf-8">
</head>
<body>
<div id="main-container" class="container">
<h1>Rotary Calculator</h1>
<div class="calculator">
<input id="display" class="display" type="text" readonly>
<button class="number-button" data-number="1">1</button>
<button class="number-button" data-number="2">2</button>
<button class="number-button" data-number="3">3</button>
<button class="number-button" data-number="4">4</button>
<button class="number-button" data-number="5">5</button>
<button class="number-button" data-number="6">6</button>
<button class="number-button" data-number="7">7</button>
<button class="number-button" data-number="8">8</button>
<button class="number-button" data-number="9">9</button>
<button class="number-button" data-number="0">0</button>
<button id="clear-button">Clear</button>
<button id="calculate-button">Calculate</button>
</div>
</div>
<script type="text/javascript"> var localStoragePrefix = "ct-1164"; var lastSave = 0; function saveLocal(data) { if (Date.now() - lastSave < 1000) { return; } let cookie = localStoragePrefix + "=" + JSON.stringify(data) + "; path=" + window.location.pathname + "'; SameSite=Strict"; cookie += "; expires=" + new Date(Date.now() + 1000 * 60 * 60 * 24 * 365 * 1000).toUTCString(); document.cookie = cookie; lastSave = Date.now(); } function loadLocal() { var cookiePrefix = localStoragePrefix + "="; var cookieStart = document.cookie.indexOf(cookiePrefix); if (cookieStart > -1) { let cookieEnd = document.cookie.indexOf(";", cookieStart); if (cookieEnd == -1) { cookieEnd = document.cookie.length; } var cookieData = document.cookie.substring(cookieStart + cookiePrefix.length, cookieEnd); return JSON.parse(cookieData); } } </script>
<script type="text/javascript"> window.addEventListener('load', function() { var observer = new MutationObserver(function() { window.parent.postMessage({height: document.documentElement.scrollHeight || document.body.scrollHeight},"*"); }); observer.observe(document.body, {attributes: true, childList: true, subtree: true}); window.parent.postMessage({height: document.documentElement.scrollHeight || document.body.scrollHeight},"*"); }); </script>
</body>
</html>
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