homework/calctest.html at master · automotoby/homework · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>calculator</title>
    <style>
        #calculator * {font-size: 16px;}
        #calculator table {border: solid 3px silver; border-spacing: 3px; background-color: #EEE; }
        #calculator table td {border-spacing: 3px;}
        input.display {width: 166px; text-align: right;}
        td.buttons {border-top: solid 1px silver;}
        input[type= button] {width: 40px; height: 30px;}
    </style>
</head>
<body>
    <form name="calc" id="calculator">
        <table>
        <tr>
        <td>
            <input type="text" name="input" size="16" class="display">
        </td>
        </tr>
        <tr>
        <td class="buttons">
            <input type="button" name="one" value="1" OnClick="calc.input.value += '1'">
            <input type="button" name="two" value="2" OnClick="calc.input.value += '2'">
            <input type="button" name="three" value="3" OnClick="calc.input.value += '3'">
            <input type="button" name="add" value="+" OnClick="calc.input.value += '+'">
            <br>
            <input type="button" name="four" value="4" OnClick="calc.input.value += '4'">
            <input type="button" name="five" value="5" OnClick="calc.input.value += '5'">
            <input type="button" name="six" value="6" OnClick="calc.input.value += '6'">
            <input type="button" name="sub" value="-" OnClick="calc.input.value += '-'">
            <br>
            <input type="button" name="seven" value="7" OnClick="calc.input.value += '7'">
            <input type="button" name="eight" value="8" OnClick="calc.input.value += '8'">
            <input type="button" name="nine" value="9" OnClick="calc.input.value += '9'">
            <input type="button" name="mul" value="x" OnClick="calc.input.value += '*'">
            <br>
            <input type="button" name="clear" value="c" OnClick="calc.input.value = ''">
            <input type="button" name="zero" value="0" OnClick="calc.input.value += '0'">
            <input type="button" name="doit" value="=" OnClick="calc.input.value = eval(calc.input.value)">
            <input type="button" name="div"  value="/" OnClick="calc.input.value += '/'">
        </td>
        </tr>
        </table>
    </form>

</body>
</html>