WP/practice9-10.html at main · yj-044/WP · 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">
    <title>실습문제 9-10</title>
    <style>
        table {
            text-align: center;
            border: hidden;
        }
        td {
            width: 100px;
        }
        input {
            width: 50%;
        }
    </style>
    <script>
        var expression="";
        function number(text)
        {
            expression += text;
            document.getElementById("win").value = expression;
        }
        function compute()
        {
            document.getElementById("win").value = eval(expression);
        }
        function evalclear()
        {
            document.getElementById("win").value = "0";
            expression = "";
        }
        function Backspace() {
            length = document.getElementById("win").value.length;
            document.getElementById("win").value = document.getElementById("win").value.substring(0, length - 1);
            expression = document.getElementById("win").value.toString();
            document.getElementById("win").value = expression;
        }
    </script>
</head>
<body>
    <h3>계산기 만들기</h3>
    <hr>
    <input type="text" id="win" value="0" style="width:99%">
    <table border=0 style="width:100%; height:100%;">
        <tr colspan=4 >
            <td><input type="button" value="Back" onclick="Backspace()"></td>
            <td><input type="button" value="CE" onclick="evalclear()"></td>
            <td><input type="button" value="C" onclick="evalclear()"></td>
            <td><input type="button" value="=" onclick="compute()"></td>
        </tr>
        <tr>
            <td><input type="button" value="7" onclick="number('7')"></td>
            <td><input type="button" value="8" onclick="number('8')"></td>
            <td><input type="button" value="9" onclick="number('9')"></td>
            <td><input type="button" value="/" onclick="number('/')"></td>
        </tr>
        <tr>
            <td><input type="button" value="4" onclick="number('4')"></td>
            <td><input type="button" value="5" onclick="number('5')"></td>
            <td><input type="button" value="6" onclick="number('6')"></td>
            <td><input type="button" value="*" onclick="number('*')"></td>
        </tr>
        <tr>
            <td><input type="button" value="1" onclick="number('1')"></td>
            <td><input type="button" value="2" onclick="number('2')"></td>
            <td><input type="button" value="3" onclick="number('3')"></td>
            <td><input type="button" value="-" onclick="number('-')"></td>
        </tr>
        <tr>
            <td><input type="button" value="0" onclick="number('0')"></td>
            <td><input type="button" value="+" onclick="number('+')"></td>
            <td><input type="button" value="NONE"></td>
            <td><input type="button" value="NONE"></td>
        </tr>
    </table>
</body>
</html>