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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Calculadora</title>
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<div class="container">
<div class="box">
<h1>Calculadora Básica</h1>
<form>
<div class="entradas">
<input type="text" id="num1" class="input">
<input type="text" id="num2" class="input"><br><br>
</div>
<!-- botões -->
<button type="button" class="btnsomar" onclick="somar()">Somar</button>
<button type="button" class="btnsubtrair" onclick="subtrair()">Subtrair</button><br>
<button type="button" class="btndividir" onclick="dividir()">Dividir</button>
<button type="button" class="btnmulti" onclick="multiplicar()">Multiplicar</button>
<button type="button" class="btnlimpa" onclick="limpar()">Limpar</button><br><br><br>
<!-- botões -->
<div class="saída">
<label style="color:#00BFFF"><strong>Resultado: </strong></label>
<input type="text" id="resp" class="input" readonly>
</div>
<script>
function somar (){
var num1,num2, resp;
num1 = parseFloat(document .getElementById("num1").value);
num2 = parseFloat(document .getElementById("num2").value);
resp = num1 + num2;
parseFloat(document.getElementById("resp").value = resp);
}
function subtrair(){
num1 = parseFloat(document .getElementById("num1").value);
num2 = parseFloat(document .getElementById("num2").value);
resp = num1 - num2;
parseFloat(document.getElementById("resp").value = resp);
}
function dividir(){
num1 = parseFloat(document .getElementById("num1").value);
num2 = parseFloat(document .getElementById("num2").value);
resp = num1 / num2;
parseFloat(document.getElementById("resp").value = resp);
}
function multiplicar(){
num1 = parseFloat(document .getElementById("num1").value);
num2 = parseFloat(document .getElementById("num2").value);
resp = num1 * num2;
parseFloat(document.getElementById("resp").value = resp);
}
function limpar(){
document.getElementById("num1").value = '';
document.getElementById("num2").value = '';
document.getElementById("resp").value = '';
}
</script>
</form>
</div>
</div>
</body>
</html>