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calculator.html
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calculator.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Calculator</title>
<style>
.*{
width: 50px;height: 50px;
}
.button{
width: 50px;height: 50px; font-size: 25px ;
}
</style>
</head>
<body>
<h1>Calculator</h1>
<table class="*">
<form action="#">
<tr>
<td colspan="4"><input type="text" id="show" style="width: 200px;height:20px;padding: 20px;font-size: 24px" ></td>
</tr>
<tr>
<td><button class="button" value="1" onclick="v(1)">1</button></td>
<td><button class="button" value="2" onclick="v(2)">2</button></td>
<td><button class="button" value="3" onclick="v(3)">3</button></td>
<td><button class="button" value="+" onclick="co()">+</button></td>
</tr>
<tr>
<td><button class="button" value="4" onclick="v(4)">4</button></td>
<td><button class="button" value="5" onclick="v(5)">5</button></td>
<td><button class="button" value="6" onclick="v(6)">6</button></td>
<td><button class="button" value="-" onclick="ch()">-</button></td>
</tr>
<tr>
<td><button class="button" value="7" onclick="v(7)">7</button></td>
<td><button class="button" value="8" onclick="v(8)">8</button></td>
<td><button class="button" value="9" onclick="v(9)">9</button></td>
<td><button class="button" value="x" onclick="nh()">x</button></td>
</tr>
<tr>
<td><button class="button" type="reset" >C</button></td>
<td><button class="button" value="0" onclick="v(0)">0</button></td>
<td><button class="button" value="=" onclick="kq()">=</button></td>
<td><button class="button" value="/" onclick="ch()">/</button></td>
</tr>
<script>
function v(x) { document.getElementById("show").value += x;}
function co() { document.getElementById("show").value += "+";}
function tr() { document.getElementById("show").value += "-";}
function nh() { let x = "*";
document.getElementById("show").value += x;}
function ch() { document.getElementById("show").value += "/";}
function kq() { document.getElementById("show").value = eval(document.getElementById("show").value);
}
</script>
</table>
</form>
</body>
</html>