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calculadora.js
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calculadora.js
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let n1 = "";
let n2 = "";
let operator = "";
let res = "";
function addNumber(number) {
if (res !== "" && operator === "") {
erase();
}
if (operator === "") {
document.getElementById("display").innerHTML += number;
n1 += number;
} else if (operator !== "" && n2 === "") {
document.getElementById("display").innerHTML = "";
document.getElementById("display").innerHTML = number;
n2 = number;
} else {
document.getElementById("display").innerHTML += number;
n2 += number;
}
}
function erase() {
n1 = "";
n2 = "";
operator = "";
res = "";
document.getElementById("display").innerHTML = "";
}
function addOperator(operatorSelected) {
if (n1 !== "") {
operator = operatorSelected;
}
}
function calculate(event) {
event.preventDefault();
if (n1 !== "" && n2 !== "" && operator !== "") {
switch (operator) {
case "+":
res = parseInt(n1) + parseInt(n2);
break;
case "-":
res = parseInt(n1) - parseInt(n2);
break;
case "*":
res = parseInt(n1) * parseInt(n2);
break;
case "/":
res = parseInt(n1) / parseInt(n2);
break;
case "^": // exponenciação
res = parseInt(n1) ** parseInt(n2);
break;
default:
break;
}
document.getElementById("display").innerHTML = "" + res.toFixed(2);
n1 = "" + res;
n2 = "";
operator = "";
}
}