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a year ago
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<!DOCTYPE html>
<html>
<head>
<title>Calculadora Científica</title>
<style>
/* Estilos para la apariencia visual */
body {
font-family: Arial, sans-serif;
background-color: #f2f2f2;
margin: 0;
display: flex;
justify-content: center;
align-items: center;
min-height: 100vh;
}
.calculator {
width: 400px;
padding: 20px;
background: linear-gradient(135deg, #f6f6f6, #e0e0e0);
border-radius: 10px;
box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
animation: breathe 4s infinite;
}
@keyframes breathe {
0%, 100% {
box-shadow: 0 0 20px rgba(0, 0, 0, 0.2), 0 0 30px rgba(255, 0, 0, 0.5);
}
16.666%, 83.333% {
box-shadow: 0 0 20px rgba(0, 0, 0, 0.2), 0 0 30px rgba(255, 165, 0, 0.5);
}
33.333%, 66.666% {
box-shadow: 0 0 20px rgba(0, 0, 0, 0.2), 0 0 30px rgba(255, 255, 0, 0.5);
}
50% {
box-shadow: 0 0 20px rgba(0, 0, 0, 0.2), 0 0 30px rgba(0, 128, 0, 0.5);
}
66.666%, 33.333% {
box-shadow: 0 0 20px rgba(0, 0, 0, 0.2), 0 0 30px rgba(0, 0, 255, 0.5);
}
83.333%, 16.666% {
box-shadow: 0 0 20px rgba(0, 0, 0, 0.2), 0 0 30px rgba(75, 0, 130, 0.5);
}
}
input[type="text"] {
width: 100%;
padding: 10px;
margin-bottom: 10px;
border: 1px solid #ccc;
border-radius: 5px;
}
.btn {
display: inline-block;
width: 70px;
height: 40px;
margin: 5px;
text-align: center;
line-height: 40px;
border: 1px solid #ccc;
border-radius: 5px;
cursor: pointer;
background-color: #f9f9f9;
transition: background-color 0.3s;
}
.btn:hover {
background-color: #eaeaea;
}
#equals {
background-color: green;
color: white;
}
</style>
</head>
<body>
<div class="calculator">
<form method="post">
<input type="text" name="expression" id="display" value="<?= $_POST['expression'] ?? '' ?>">
<div>
<!-- Botones numéricos y operadores -->
<div>
<div class="btn" onclick="appendText('7')">7</div>
<div class="btn" onclick="appendText('8')">8</div>
<div class="btn" onclick="appendText('9')">9</div>
<div class="btn" onclick="appendText('/')">/</div>
</div>
<div>
<div class="btn" onclick="appendText('4')">4</div>
<div class="btn" onclick="appendText('5')">5</div>
<div class="btn" onclick="appendText('6')">6</div>
<div class="btn" onclick="appendText('*')">*</div>
</div>
<div>
<div class="btn" onclick="appendText('1')">1</div>
<div class="btn" onclick="appendText('2')">2</div>
<div class="btn" onclick="appendText('3')">3</div>
<div class="btn" onclick="appendText('-')">-</div>
</div>
<div>
<div class="btn" onclick="appendText('0')">0</div>
<div class="btn" onclick="appendText('.')">.</div>
<button class="btn" id="equals" name="equals" type="submit">=</button>
<div class="btn" onclick="appendText('+')">+</div>
</div>
<!-- botones científicos -->
<div>
<div class="btn" onclick="appendText('Math.sqrt(')">√</div>
<div class="btn" onclick="calculatePower(2)">x²</div>
<div class="btn" onclick="calculatePower(3)">x³</div>
<div class="btn" onclick="appendText('**')">^</div>
<div class="btn" onclick="appendText('Math.exp(')">eˣ</div>
<div class="btn" onclick="appendText('Math.log10(')">log</div>
<div class="btn" id="clear" onclick="clearDisplay()">C</div>
<div class="btn" onclick="appendText('(')">(</div>
<div class="btn" onclick="appendText(')')">)</div>
</div>
</div>
</form>
</div>
<?php
if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['expression'])) {
$expression = $_POST['expression'];
$result = '';
if ($expression !== '') {
$result = calculateExpression($expression);
echo "<script>console.log('Resultado: $result');</script>"; // Imprimir resultado en consola
}
}
function calculateExpression($expression) {
try {
$expression = str_replace('^', '**', $expression); // Reemplazar '^' con '**'
$expression = str_replace('**2', '**2', $expression); // Reemplazar '**2' con '**2'
$expression = str_replace('**3', '**3', $expression); // Reemplazar '**3' con '**3'
$expression = str_replace('Math.sqrt(', 'sqrt(', $expression); // Reemplazar 'Math.sqrt(' con 'sqrt('
$expression = str_replace('Math.exp(', 'exp(', $expression); // Reemplazar 'Math.exp(' con 'exp('
$expression = str_replace('Math.log10(', 'log10(', $expression); // Reemplazar 'Math.log10(' con 'log10('
return eval("return $expression;");
} catch (Throwable $e) {
return 'Error';
}
}
?>
<script>
function appendText(text) {
const display = document.getElementById('display');
display.value += text;
}
function calculatePower(power) {
const display = document.getElementById('display');
const currentValue = parseFloat(display.value);
if (!isNaN(currentValue)) {
display.value = currentValue ** power;
}
}
function clearDisplay() {
const display = document.getElementById('display');
display.value = '';
}
<?php if (isset($result)) : ?>
window.onload = function() {
const result = '<?= $result ?>';
if (result !== '') {
const display = document.getElementById('display');
display.value = result;
}
};
<?php endif; ?>
</script>
</body>
</html>