<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Calculator</title>
<link rel="stylesheet" href="styles.css" />
</head>
<body>
<div class="calculator">
<div class="display" id="display">0</div>
<div class="buttons">
<button class="btn" onclick="clearDisplay()">C</button>
<button class="btn" onclick="invertSign()">+/-</button>
<button class="btn" onclick="inputOperator('-')">-</button>
<button class="btn" onclick="inputOperator('/')">/</button>
<button class="btn" onclick="inputDigit('7')">7</button>
<button class="btn" onclick="inputDigit('8')">8</button>
<button class="btn" onclick="inputDigit('9')">9</button>
<button class="btn" onclick="inputOperator('*')">X</button>
<button class="btn" onclick="inputDigit('4')">4</button>
<button class="btn" onclick="inputDigit('5')">5</button>
<button class="btn" onclick="inputDigit('6')">6</button>
<button class="btn" onclick="inputOperator('%')">%</button>
<button class="btn" onclick="inputDigit('1')">1</button>
<button class="btn" onclick="inputDigit('2')">2</button>
<button class="btn" onclick="inputDigit('3')">3</button>
<button class="btn" onclick="inputOperator('+')">+</button>
<button class="btn" onclick="inputDigit('0')">0</button>
<button class="btn" onclick="inputDigit('.')">.</button>
<button class="btn equal" onclick="calculateResult()">=</button>
</div>
</div>
<script src="script.js"></script>
</body>
</html>
