spf 2 months ago
parent 0f025468ba
commit 8af63e0bd8

@ -0,0 +1,213 @@
<!DOCTYPE html>
<style>
/* styles.css */
body {
font-family: Arial, sans-serif;
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
background-color: #f0f0f0;
margin: 0;
}
.calculator {
border: 1px solid #ccc;
border-radius: 5px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
background-color: #fff;
padding: 20px;
}
.calculator-screen {
width: 100%;
height: 80px;
border: none;
background-color: #eee;
text-align: right;
font-size: 2em;
padding: 20px;
box-sizing: border-box;
border-radius: 5px;
margin-bottom: 10px;
}
.calculator-keys {
display: grid;
grid-template-columns: repeat(4, 1fr);
gap: 10px;
}
button {
height: 60px;
font-size: 1.5em;
border: none;
border-radius: 5px;
background-color: #eee;
cursor: pointer;
transition: background-color 0.3s;
}
button:hover {
background-color: #ddd;
}
button.operator {
background-color: #007BFF;
color: #fff;
}
button.operator:hover {
background-color: #0056b3;
}
button.all-clear, button.equal-sign {
grid-column: span 2;
background-color: #28a745;
color: #fff;
}
button.all-clear:hover, button.equal-sign:hover {
background-color: #218838;
}
</style>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Simple Calculator</title>
</head>
<body>
<div class="calculator">
<input type="text" class="calculator-screen" value="" disabled />
<div class="calculator-keys">
<button type="button" class="operator" value="+">+</button>
<button type="button" class="operator" value="-">-</button>
<button type="button" class="operator" value="*">&times;</button>
<button type="button" class="operator" value="/">&divide;</button>
<button type="button" class="operator" value="%">%</button>
<button type="button" value="7">7</button>
<button type="button" value="8">8</button>
<button type="button" value="9">9</button>
<button type="button" value="4">4</button>
<button type="button" value="5">5</button>
<button type="button" value="6">6</button>
<button type="button" value="1">1</button>
<button type="button" value="2">2</button>
<button type="button" value="3">3</button>
<button type="button" value="0">0</button>
<button type="button" class="decimal" value=".">.</button>
<button type="button" class="all-clear" value="all-clear">AC</button>
<button type="button" class="equal-sign operator" value="=">=</button>
</div>
</div>
<script src="script.js"></script>
</body>
</html>
<script>
// script.js
document.addEventListener('DOMContentLoaded', (event) => {
const calculator = {
displayValue: '0',
firstOperand: null,
waitingForSecondOperand: false,
operator: null,
};
function updateDisplay() {
const display = document.querySelector('.calculator-screen');
display.value = calculator.displayValue;
}
const inputKeys = document.querySelector('.calculator-keys');
inputKeys.addEventListener('click', (event) => {
const { target } = event;
const { value } = target;
if (!target.matches('button')) {
return;
}
switch (value) {
case '+':
case '-':
case '*':
case '/':
case '%':
if (calculator.waitingForSecondOperand) {
calculate(calculator.firstOperand, calculator.displayValue, calculator.operator);
} else {
calculator.firstOperand = parseFloat(calculator.displayValue);
calculator.waitingForSecondOperand = true;
calculator.operator = value;
}
calculator.displayValue = '';
break;
case '=':
if (calculator.waitingForSecondOperand) {
calculate(calculator.firstOperand, calculator.displayValue, calculator.operator);
}
break;
case '.':
if (!calculator.displayValue.includes('.')) {
calculator.displayValue += value;
}
break;
case 'all-clear':
calculator.displayValue = '0';
calculator.firstOperand = null;
calculator.waitingForSecondOperand = false;
calculator.operator = null;
break;
default:
if (Number.isInteger(parseFloat(value))) {
if (calculator.displayValue === '0' && value !== '0') {
calculator.displayValue = value;
} else {
calculator.displayValue += value;
}
}
}
updateDisplay();
});
function calculate(firstOperand, secondOperand, operator) {
let result;
const secondOperandNumber = parseFloat(secondOperand);
switch (operator) {
case '+':
result = firstOperand + secondOperandNumber;
break;
case '-':
result = firstOperand - secondOperandNumber;
break;
case '*':
result = firstOperand * secondOperandNumber;
break;
case '/':
result = firstOperand / secondOperandNumber;
break;
case '%':
result = firstOperand % secondOperandNumber;
break;
default:
return;
}
calculator.displayValue = result;
calculator.firstOperand = result;
calculator.waitingForSecondOperand = false;
calculator.operator = null;
}
updateDisplay();
});
</script>
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