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index.html
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index.html
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<hmtl>
<head>
<style>
* {
margin: 0;
padding: 0;
}
.fundo {
background: linear-gradient(to right, rgb(255, 254, 254), rgb(2, 139, 252));
height: 100%;
}
.cal {
position: absolute;
top: 50%;
left: 50%;
transform: translateX(-50%) translateY(-50%);
box-shadow: 10px 0px 40px rgb(0, 0, 0);
}
.button {
width: 50px;
height: 50px;
font-size: 25;
margin: 2px;
cursor: pointer;
background: #8071c49f;
color: white;
border: none;
}
input.button:hover {
background: #6042e29f;
}
.textview {
width: 217px;
height: 40px;
margin: 5px;
font-size: 25px;
padding: 5px;
border: none;
color: #000000;
}
#igual {
height: 107px;
}
#numero0 {
width: 107px;
}
</style>
<title>
Calculadora
</title>
</head>
<body>
<div class="fundo">
<div class="cal">
<form name="cx">
<input class="textview" name="textview">
<table>
<tr>
<td><input class="button" type="button" value="C" onclick="clean()"></td>
<td><input class="button" type="button" value="+" onclick="insert('+')"></td>
<td><input class="button" type="button" value="-" onclick="insert('-')"></td>
<td><input class="button" type="button" value="X" onclick="insert('*')"></td>
</tr>
<tr>
<td><input class="button" type="button" value="1" onclick="insert(1)"></td>
<td><input class="button" type="button" value="2" onclick="insert(2)"></td>
<td><input class="button" type="button" value="3" onclick="insert(3)"></td>
<td><input class="button" type="button" value="/" onclick="insert('/')"></td>
</tr>
<tr>
<td><input class="button" type="button" value="4" onclick="insert(4)"></td>
<td><input class="button" type="button" value="5" onclick="insert(5)"></td>
<td><input class="button" type="button" value="6" onclick="insert(6)"></td>
<td><input class="button" type="button" value="<" onclick="back()"></td>
</tr>
<tr>
<td><input class="button" type="button" value="7" onclick="insert(7)"></td>
<td><input class="button" type="button" value="8" onclick="insert(8)"></td>
<td><input class="button" type="button" value="9" onclick="insert(9)"></td>
<td rowspan="5"><input class="button" id="igual" type="button" value="=" onclick="equal()"></td>
</tr>
<tr>
<td colspan="2"><input class="button" id="Numero0" type="button" value="0" onclick="insert(0)">
</td>
<td><input class="button" type="button" value="." onclick="insert('.')"></td>
</tr>
</table>
</form>
</div>
</div>
<script>
function insert(num) {
document.cx.textview.value = document.cx.textview.value + num;
}
function equal() {
var exp = document.cx.textview.value;
if (exp) {
document.cx.textview.value = eval(exp);
}
}
function clean() {
document.cx.textview.value = "";
}
function back() {
var exp = document.cx.textview.value;
document.cx.textview.value = exp.substr(0, exp.length - 1);
}
</script>
</body>
</hmtl>