siamo ciò che mangiamo
https://amzn.to/3W3TWK4
<!DOCTYPE html>
<html lang="it">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Calcolatrice</title>
<style>
body {
font-family: Arial, sans-serif;
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
background-color: #f0f0f0;
}
.calculator {
background-color: #fff;
padding: 20px;
border-radius: 10px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
.display {
width: 100%;
height: 50px;
background-color: #222;
color: #fff;
text-align: right;
font-size: 24px;
padding: 10px;
box-sizing: border-box;
border-radius: 5px;
margin-bottom: 20px;
}
.buttons {
display: grid;
grid-template-columns: repeat(4, 1fr);
gap: 10px;
}
.buttons button {
padding: 20px;
font-size: 18px;
border: none;
border-radius: 5px;
cursor: pointer;
background-color: #f9f9f9;
box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}
.buttons button:active {
background-color: #ddd;
}
.buttons .equal {
grid-column: span 4;
background-color: #2196f3;
color: #fff;
}
</style>
</head>
<body>
<div class="calculator">
<div class="display" id="display">0</div>
<div class="buttons">
<button onclick="clearDisplay()">C</button>
<button onclick="appendToDisplay('(')">(</button>
<button onclick="appendToDisplay(')')">)</button>
<button onclick="appendToDisplay('/')">/</button>
<button onclick="appendToDisplay('7')">7</button>
<button onclick="appendToDisplay('8')">8</button>
<button onclick="appendToDisplay('9')">9</button>
<button onclick="appendToDisplay('*')">*</button>
<button onclick="appendToDisplay('4')">4</button>
<button onclick="appendToDisplay('5')">5</button>
<button onclick="appendToDisplay('6')">6</button>
<button onclick="appendToDisplay('-')">-</button>
<button onclick="appendToDisplay('1')">1</button>
<button onclick="appendToDisplay('2')">2</button>
<button onclick="appendToDisplay('3')">3</button>
<button onclick="appendToDisplay('+')">+</button>
<button onclick="appendToDisplay('0')">0</button>
<button onclick="appendToDisplay('.')">.</button>
<button onclick="calculate()">=</button>
</div>
</div>
<script>
function clearDisplay() {
document.getElementById('display').innerText = '0';
}
function appendToDisplay(value) {
const display = document.getElementById('display');
if (display.innerText === '0') {
display.innerText = value;
} else {
display.innerText += value;
}
}
function calculate() {
const display = document.getElementById('display');
try {
display.innerText = eval(display.innerText);
} catch (e) {
display.innerText = 'Errore';
}
}
</script>
</body>
</html>
