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webarena620ba1c<!DOCTYPE html>
<html>
<head>
<title>Calculator</title>
<style>
body {
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
background-color: #f2f2f2;
font-family: Arial, sans-serif;
}
#calculator {
border: 1px solid #333;
padding: 30px;
border-radius: 10px;
width: 400px;
background-color: #fff;
box-shadow: 0px 0px 10px rgba(0,0,0,0.1);
box-sizing: border-box;
display: flex;
flex-direction: column;
align-items: flex-end;
}
#calculator h1 {
text-align: center;
margin-bottom: 20px;
align-self: center;
}
#calculator p {
text-align: center;
margin-bottom: 20px;
color: #666;
align-self: center;
}
#inputExpression {
width: 100%;
padding: 15px;
font-size: 18px;
border-radius: 5px;
border: 1px solid #ddd;
box-sizing: border-box;
margin-bottom: 10px;
}
#result {
margin-top: 20px;
font-size: 20px;
text-align: center;
color: #333;
width: 100%;
align-self: center;
}
button {
padding: 10px 20px;
margin-top: 10px;
font-size: 18px;
border: none;
border-radius: 5px;
cursor: pointer;
align-self: flex-end;
}
#calculate {
background-color: #4CAF50;
color: white;
}
#clear {
background-color: #f44336;
color: white;
}
</style>
</head>
<body>
<div id="calculator">
<h1>Calculator</h1>
<p>Enter the expression and get the results</p>
<input type="text" id="inputExpression" placeholder="Enter expression" />
<button id="calculate">=</button>
<button id="clear">Clear</button>
<div id="result">Result: <span id="calculationResult"></span></div>
</div>
<script>
document.getElementById('calculate').addEventListener('click', function() {
try {
const result = eval(document.getElementById('inputExpression').value);
if (!isNaN(result)) {
document.getElementById('calculationResult').textContent = result;
} else {
document.getElementById('calculationResult').textContent = 'Invalid expression';
}
} catch {
document.getElementById('calculationResult').textContent = 'Invalid expression';
}
});
document.getElementById('clear').addEventListener('click', function() {
document.getElementById('inputExpression').value = '';
document.getElementById('calculationResult').textContent = '';
});
document.getElementById('inputExpression').addEventListener('keypress', function(e) {
if (e.key === 'Enter') {
document.getElementById('calculate').click();
}
});
</script>
</body>
</html>