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Практическая работа 10.7 #3

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Практическая работа 10.7 #3

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250 changes: 227 additions & 23 deletions bjs/07_Number_and_string/index.html
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Original file line number Diff line number Diff line change
@@ -1,32 +1,236 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<head>
<meta charset="UTF-8" />
<title>Калькулятор</title>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css"
integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
<link href="https://fonts.googleapis.com/css2?family=Share+Tech+Mono&display=swap" rel="stylesheet">
<link rel="stylesheet" href="style.css" type="text/css"/>
</head>
<body>
<div class="container">
<div class="row calc-row align-items-center">
<link
rel="stylesheet"
href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css"
integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh"
crossorigin="anonymous"
/>
<link
href="https://fonts.googleapis.com/css2?family=Share+Tech+Mono&display=swap"
rel="stylesheet"
/>
<link rel="stylesheet" href="style.css" type="text/css" />
</head>
<body>
<div class="container">
<div class="row calc-row align-items-center">
<div class="col col-md-4 offset-md-4">
<div class="form-group">
<div class="card" id="calc">
<div class="card-body">
<input class="form-control input-window" id="inputWindow" value="">
<div class="row no-gutters">
<div class="col">
<button class="btn btn-outline-danger form-control" id="btn_clr">C</button>
</div>
</div>
</div>
<div class="form-group">
<div class="card" id="calc">
<div class="card-body">
<input
class="form-control input-window"
id="inputWindow"
value=""
/>
<select
class="custom-select form-control form-control-sm"
id="history_selector"
>
<option></option>
</select>
<div class="row no-gutters">
<div class="col">
<button
class="btn btn-outline-danger form-control"
data-action="clr"
id="btn_clr"
>
AC
</button>
</div>

<div class="col">
<button
class="btn btn-outline-danger form-control"
data-action="clr_last"
id="btn_clr_last"
>
C
</button>
</div>

<div class="col">
<button
class="btn btn-outline-primary form-control"
data-action="sign"
id="btn_sign"
>
&PlusMinus;
</button>
</div>
<div class="col">
<button
class="btn btn-outline-primary form-control"
data-action="divide"
id="btn_divide"
>
&divide;
</button>
</div>
</div>
<div class="row no-gutters">
<div class="col">
<button
class="btn btn-outline-primary form-control"
data-action="1"
id="btn_1"
>
1
</button>
</div>
<div class="col">
<button
class="btn btn-outline-primary form-control"
data-action="2"
id="btn_2"
>
2
</button>
</div>
<div class="col">
<button
class="btn btn-outline-primary form-control"
data-action="3"
id="btn_3"
>
3
</button>
</div>
<div class="col">
<button
class="btn btn-outline-primary form-control"
data-action="multi"
id="btn_multi"
>
*
</button>
</div>
</div>
<div class="row no-gutters">
<div class="col">
<button
class="btn btn-outline-primary form-control"
data-action="4"
id="btn_4"
>
4
</button>
</div>
<div class="col">
<button
class="btn btn-outline-primary form-control"
data-action="5"
id="btn_5"
>
5
</button>
</div>
<div class="col">
<button
class="btn btn-outline-primary form-control"
data-action="6"
id="btn_6"
>
6
</button>
</div>
<div class="col">
<button
class="btn btn-outline-primary form-control"
data-action="minus"
id="btn_minus"
>
-
</button>
</div>
</div>
<div class="row no-gutters">
<div class="col">
<button
class="btn btn-outline-primary form-control"
data-action="7"
id="btn_7"
>
7
</button>
</div>
<div class="col">
<button
class="btn btn-outline-primary form-control"
data-action="8"
id="btn_8"
>
8
</button>
</div>
<div class="col">
<button
class="btn btn-outline-primary form-control"
data-action="9"
id="btn_9"
>
9
</button>
</div>
<div class="col">
<button
class="btn btn-outline-primary form-control"
data-action="sum"
id="btn_sum"
>
+
</button>
</div>
</div>
<div class="row no-gutters">
<div class="col">
<button
class="btn btn-outline-primary form-control"
data-action="0"
id="btn_0"
>
0
</button>
</div>
<div class="col">
<button
class="btn btn-outline-primary form-control"
data-action="point"
id="btn_point"
>
.
</button>
</div>
<div class="col">
<button
class="btn btn-outline-primary form-control"
data-action="sqrt"
id="btn_sqrt"
>
&Sqrt;
</button>
</div>
<div class="col">
<button
class="btn btn-outline-primary form-control"
data-action="equal"
id="btn_equal"
>
=
</button>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<script src="script.js"></script>
</body>
<script src="script.js"></script>
</body>
</html>
128 changes: 120 additions & 8 deletions bjs/07_Number_and_string/script.js
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Original file line number Diff line number Diff line change
@@ -1,12 +1,124 @@
let lastOperand = 0;
let operation = null;
let operations = { sum: "+", minus: "-", multi: "*", divide: "/" };
let history = [];
let allHistory = [];
const PRECISION = 2;

const inputWindow = document.getElementById('inputWindow');
const inputWindow = document.getElementById("inputWindow");
const inputHistory = document.getElementById("history");
const selectHistory = document.getElementById("history_selector");

renderCalc();

document.getElementById('btn_clr').addEventListener('click', function () {
lastOperand = 0;
operation = null;
inputWindow.value = '';
})
/* Очистка калькулятора */
document.getElementById("btn_clr").addEventListener("click", function () {
history = [];
renderCalc();
});

/* Перерисовка калькулятора */
function renderCalc() {
inputWindow.value = history.length > 0 ? history[history.length - 1] : "0";
selectHistory.options[0].text = history.length > 0 ? history.join("") : "0";
}

/* Проверка, что последней была введена операция */
function isLastOperation() {
if (Object.values(operations).indexOf(history[history.length - 1]) >= 0)
return true;
else return false;
}

/* отмена последнего ввода */
document.getElementById("btn_clr_last").addEventListener("click", function () {
let isLast = isLastOperation();
if (history.length) {
if (!isLast) {
let item = history.pop();
history.push(item.slice(0, item.length - 1));
} else {
history.pop();
}
}
renderCalc();
});

/* Нажатие клавиши с операцией */
Object.keys(operations).forEach((oper) => {
document.getElementById(`btn_${oper}`).addEventListener("click", function () {
if (isLastOperation()) history.pop();
history.push(operations[oper]);
renderCalc();
});
});

/* Квадратный корень */

document.getElementById("btn_sqrt").addEventListener("click", function () {
if (history.length) {
let isLast = isLastOperation();
if (!isLast) {
let item = history.pop();
history.push(Math.sqrt(parseFloat(item)).toPrecision(PRECISION));
}
}
renderCalc();
});

/* Нажатие цифры на клавиатуре - запись числа в массив history */
for (let i = 0; i < 10; i++) {
document.querySelector(`#btn_${i}`).addEventListener("click", function (evt) {
if (!history.length) history.push(i.toString());
else if (isLastOperation()) history.push(i.toString());
else history.push(history.pop() + i.toString());
renderCalc();
});
}

/* Нажатие точки */
document.getElementById("btn_point").addEventListener("click", function () {
if (!isLastOperation() && !history[history.length - 1].match(/\./)) {
history.push(history.pop() + ".");
}
renderCalc();
});

/* Изменение знака */
document.getElementById("btn_sign").addEventListener("click", function () {
if (!isLastOperation() && history.length) {
history.push((-1 * history.pop()).toString());
}
renderCalc();
});

/* Вычисление результата */
document.getElementById("btn_equal").addEventListener("click", function () {
let result = history.reduce((result, current, index, array) => {
if (index === 0) result = parseFloat(current);
let currentIndex = Object.values(operations).indexOf(current);
if (currentIndex >= 0) {
let nextItem = parseFloat(array[index + 1]);
switch (Object.keys(operations)[currentIndex]) {
case "sum":
result += nextItem;
break;
case "minus":
result -= nextItem;
break;
case "multi":
result *= nextItem;
break;
case "divide":
result /= nextItem;
break;
}
}
return result;
}, 0);
history.push("=" + result.toFixed(PRECISION));
allHistory.push(history);
let newOption = new Option(history.join(""));
selectHistory.append(newOption);
history = [];
history.push(result.toFixed(PRECISION));
renderCalc();
});