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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Scientific Calculator</title>
<script src="https://cdn.tailwindcss.com"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
<style>
.calculator {
box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
border-radius: 20px;
overflow: hidden;
transition: all 0.3s ease;
}
.calculator:hover {
box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}
.display {
min-height: 100px;
word-wrap: break-word;
overflow: hidden;
}
.btn {
transition: all 0.2s ease;
transform: scale(1);
}
.btn:active {
transform: scale(0.95);
}
.btn-operator {
background-color: #f59e0b;
}
.btn-function {
background-color: #4b5563;
}
.btn-equals {
background-color: #10b981;
}
.btn-clear {
background-color: #ef4444;
}
.btn-memory {
background-color: #7c3aed;
}
.btn:hover {
opacity: 0.9;
}
.history-panel {
transition: all 0.3s ease;
max-height: 0;
overflow: hidden;
}
.history-panel.active {
max-height: 200px;
}
@media (max-width: 640px) {
.btn {
padding: 0.5rem;
font-size: 0.9rem;
}
}
</style>
</head>
<body class="bg-gray-100 min-h-screen flex items-center justify-center p-4">
<div class="calculator bg-gray-800 w-full max-w-md">
<!-- Display Area -->
<div class="p-4">
<div class="bg-gray-900 rounded-lg p-4 mb-2">
<div class="history-panel bg-gray-800 text-gray-300 text-sm mb-2 overflow-y-auto" id="historyPanel"></div>
<div class="display text-right text-white text-3xl font-semibold py-2 px-1" id="display">0</div>
<div class="text-right text-gray-400 text-sm" id="operation"></div>
</div>
</div>
<!-- Button Grid -->
<div class="grid grid-cols-5 gap-2 p-4">
<!-- Memory Functions -->
<button class="btn btn-memory text-white rounded-lg p-3 col-span-1" onclick="memoryAdd()">M+</button>
<button class="btn btn-memory text-white rounded-lg p-3 col-span-1" onclick="memorySubtract()">M-</button>
<button class="btn btn-memory text-white rounded-lg p-3 col-span-1" onclick="memoryRecall()">MR</button>
<button class="btn btn-memory text-white rounded-lg p-3 col-span-1" onclick="memoryClear()">MC</button>
<button class="btn btn-clear text-white rounded-lg p-3 col-span-1" onclick="clearAll()">AC</button>
<!-- First Row -->
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('(')">(</button>
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="addToDisplay(')')">)</button>
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('%')">%</button>
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('Math.PI')">π</button>
<button class="btn btn-clear text-white rounded-lg p-3 col-span-1" onclick="clearDisplay()">C</button>
<!-- Second Row -->
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="addFunction('Math.sin(')">sin</button>
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="addFunction('Math.cos(')">cos</button>
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="addFunction('Math.tan(')">tan</button>
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('Math.log(')">ln</button>
<button class="btn btn-operator text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('/')">/</button>
<!-- Third Row -->
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="addFunction('Math.asin(')">sin⁻¹</button>
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="addFunction('Math.acos(')">cos⁻¹</button>
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="addFunction('Math.atan(')">tan⁻¹</button>
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('Math.log10(')">log</button>
<button class="btn btn-operator text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('*')">×</button>
<!-- Fourth Row -->
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('Math.sqrt(')">√</button>
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('Math.pow(')">x^y</button>
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('Math.exp(')">e^x</button>
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="factorial()">x!</button>
<button class="btn btn-operator text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('-')">-</button>
<!-- Fifth Row -->
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('Math.abs(')">|x|</button>
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('Math.floor(')">floor</button>
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('Math.ceil(')">ceil</button>
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('Math.round(')">round</button>
<button class="btn btn-operator text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('+')">+</button>
<!-- Sixth Row -->
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('Math.random()')">rand</button>
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('Math.E')">e</button>
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('10^')">10^x</button>
<button class="btn btn-function text-white rounded-lg p-3 col-span-1" onclick="toggleHistory()">
<i class="fas fa-history"></i>
</button>
<button class="btn btn-equals text-white rounded-lg p-3 col-span-1" onclick="calculate()">=</button>
<!-- Number Pad -->
<button class="btn bg-gray-700 text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('7')">7</button>
<button class="btn bg-gray-700 text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('8')">8</button>
<button class="btn bg-gray-700 text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('9')">9</button>
<button class="btn bg-gray-700 text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('4')">4</button>
<button class="btn bg-gray-700 text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('5')">5</button>
<button class="btn bg-gray-700 text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('6')">6</button>
<button class="btn bg-gray-700 text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('1')">1</button>
<button class="btn bg-gray-700 text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('2')">2</button>
<button class="btn bg-gray-700 text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('3')">3</button>
<button class="btn bg-gray-700 text-white rounded-lg p-3 col-span-2" onclick="addToDisplay('0')">0</button>
<button class="btn bg-gray-700 text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('.')">.</button>
<button class="btn bg-gray-700 text-white rounded-lg p-3 col-span-1" onclick="addToDisplay('Math.pow(10,')">EE</button>
</div>
</div>
<script>
// Calculator state
let currentDisplay = '0';
let operationDisplay = '';
let memoryValue = 0;
let history = [];
let isHistoryVisible = false;
// DOM elements
const displayElement = document.getElementById('display');
const operationElement = document.getElementById('operation');
const historyPanel = document.getElementById('historyPanel');
// Initialize display
updateDisplay();
// Function to update the display
function updateDisplay() {
displayElement.textContent = currentDisplay;
operationElement.textContent = operationDisplay;
}
// Function to add content to the display
function addToDisplay(value) {
if (currentDisplay === '0' && value !== '.') {
currentDisplay = value;
} else {
currentDisplay += value;
}
updateDisplay();
}
// Function to add functions with parentheses
function addFunction(func) {
currentDisplay += func;
updateDisplay();
}
// Function to clear the display
function clearDisplay() {
currentDisplay = '0';
operationDisplay = '';
updateDisplay();
}
// Function to clear everything
function clearAll() {
currentDisplay = '0';
operationDisplay = '';
memoryValue = 0;
updateDisplay();
}
// Function to calculate the result
function calculate() {
try {
// Save the operation for history
const operation = currentDisplay;
// Evaluate the expression
let result = eval(currentDisplay);
// Handle very large or small numbers with scientific notation
if (Math.abs(result) > 1e12 || (Math.abs(result) < 1e-4 && result !== 0)) {
result = result.toExponential(6);
} else if (Number.isInteger(result)) {
result = result.toString();
} else {
// Limit decimal places for regular numbers
result = parseFloat(result.toFixed(10)).toString();
}
// Update displays
operationDisplay = operation + ' =';
currentDisplay = result;
updateDisplay();
// Add to history
addToHistory(operation, result);
} catch (error) {
currentDisplay = 'Error';
updateDisplay();
}
}
// Function to add calculation to history
function addToHistory(operation, result) {
history.unshift({ operation, result });
if (history.length > 5) {
history.pop();
}
updateHistoryPanel();
}
// Function to update history panel
function updateHistoryPanel() {
historyPanel.innerHTML = history.map(item =>
`<div class="py-1 border-b border-gray-700">
<div class="text-gray-400">${item.operation} =</div>
<div class="text-white">${item.result}</div>
</div>`
).join('');
}
// Function to toggle history panel visibility
function toggleHistory() {
isHistoryVisible = !isHistoryVisible;
if (isHistoryVisible) {
historyPanel.classList.add('active');
historyPanel.classList.remove('max-h-0');
historyPanel.classList.add('max-h-48');
} else {
historyPanel.classList.remove('active');
historyPanel.classList.remove('max-h-48');
historyPanel.classList.add('max-h-0');
}
}
// Memory functions
function memoryAdd() {
try {
memoryValue += parseFloat(eval(currentDisplay));
} catch (error) {
currentDisplay = 'Error';
updateDisplay();
}
}
function memorySubtract() {
try {
memoryValue -= parseFloat(eval(currentDisplay));
} catch (error) {
currentDisplay = 'Error';
updateDisplay();
}
}
function memoryRecall() {
currentDisplay = memoryValue.toString();
updateDisplay();
}
function memoryClear() {
memoryValue = 0;
}
// Factorial function
function factorial() {
try {
const num = parseInt(eval(currentDisplay));
if (num < 0) {
currentDisplay = 'Error';
} else if (num === 0 || num === 1) {
currentDisplay = '1';
} else {
let result = 1;
for (let i = 2; i <= num; i++) {
result *= i;
}
currentDisplay = result.toString();
}
updateDisplay();
} catch (error) {
currentDisplay = 'Error';
updateDisplay();
}
}
// Keyboard support
document.addEventListener('keydown', function(event) {
const key = event.key;
// Numbers
if (/[0-9]/.test(key)) {
addToDisplay(key);
return;
}
// Operators
if (['+', '-', '*', '/', '%', '(', ')', '.'].includes(key)) {
addToDisplay(key);
return;
}
// Special keys
switch (key) {
case 'Enter':
calculate();
break;
case 'Escape':
clearAll();
break;
case 'Backspace':
currentDisplay = currentDisplay.slice(0, -1) || '0';
updateDisplay();
break;
case '^':
addToDisplay('Math.pow(');
break;
case '!':
factorial();
break;
}
});
</script>
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</html> |