(adsbygoogle = window.adsbygoogle || []).push({ google_ad_client: "ca-pub-8242763509535969", enable_page_level_ads: true }); [자바스크립트] 계산기 :: 깜냥깜냥

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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>계산기</title>
<style type="text/css">
.button1 {
    background-Color: #FFC5D0; /*--백그라운드 정의---*/
    font: 12px; /*--폰트 정의---*/
    font-weight: bold; /*--폰트 굵기---*/
    color: #8FFFE0; /*--폰트 색깔---*/
}
 
.button2 {
    background-Color: #FFB78F;
    font: 12px;
    color: #FAD4DC;
}
 
.button3 {
    background-Color: #FFCFB5;
    font: 12px;
    color: #9B558E;
}
 
.button4 {
    background-Color: #D2ECC4;
    font: 12px;
    color: #50917D;
}
</style>
<script language="javascript">
    function num(chr) {
        var input = document.getElementById("display");
        if (input.value == null || input.value == "0") {
            input.value = chr;
        } else {
            input.value += chr;
        }
        return input.value
    }
 
    function deletee(input) {
        input.value = input.value.substring(0, input.value.length - 1)
    }
 
    function pie(input) {
        input.value = eval(input.value) * PI
    }
 
    function change(input) {
        if (input.value.substring(0, 1) == "-")
            input.value = input.value.substring(1, input.value.length)
        else
            input.value = "-" + input.value
    }
    function sqrt(input) {
        input.value = Math.sqrt(input.value);
    }
    function tan(input) {
        input.value = Math.tan((input.value*3.141592)/180);
    }
    function sin(input) {
        input.value = Math.sin((input.value*3.141592)/180);
    }
    function cos(input) {
        input.value = Math.cos((input.value*3.141592)/180);
    }
    function log(input) {
        input.value = log(input.value)
    }
 
    function cal(input) {
        input.value = eval(input.value)
    }
    function square(input) {
        input.value = eval(input.value) * eval(input.value)
    }
</script>
</head>
<body marginheight="80">
    <form>
        <table align="center" width="150" height="250">
            <tr>
                <td align="center" colspan="6"><input type="text"
                    style="color: #72A1FF" id="display" size="20" value="0"></td>
            </tr>
            <tr>
                <td align="center" id="Clear" width="30"><input type="button"
                    value="C" size="40" maxlength="20" class="button1"
                    onClick="this.form.display.value = 0 "></td>
                <td align="center" id="result" colspan="2" width="30"><input type="button"
                    value="<-" class="button1" onclick="deletee(this.form.display)"></td>
                <td align="center" id="result" width="30"><input type="button"
                    value="=" class="button1" onclick="cal(this.form.display)"></td>
                <td align="center" width="30"><input type="button" id="root"
                    value="√" class="button4" onclick="sqrt(this.form.display)"></td>
                    
            </tr>
            <tr>
                <td align="center" width="30"><input type="button" value="1"
                    class="button2" onclick="num(1)"></td>
                <td align="center" width="30"><input type="button" value="2"
                    class="button2" onclick="num(2)"></td>
                <td align="center" width="30"><input type="button" value="3"
                    class="button2" onclick="num(3)"></td>
                <td align="center" width="30"><input type="button" value="+"
                    class="button3" onclick="num('+')"></td>
                <td align="center" width="30"><input type="button" value="x^2"
                    class="button4" onclick="square(this.form.display)"></td>
            </tr>
            <tr>
                <td align="center" width="30"><input type="button" value="4"
                    class="button2" onclick="num(4)"></td>
                <td align="center" width="30"><input type="button" value="5"
                    class="button2" onclick="num(5)"></td>
                <td align="center" width="30"><input type="button" value="6"
                    class="button2" onclick="num(6)"></td>
                <td align="center" width="30"><input type="button" value="-"
                    class="button3" onclick="num('-')"></td>
                <td align="center"><input type="button" value="sin"
                    class="button4" onclick="sin(this.form.display)"></td>
 
            </tr>
            <tr>
                <td align="center" width="30"><input type="button" value="7"
                    class="button2" onclick="num(7)"></td>
                <td align="center" width="30"><input type="button" value="8"
                    class="button2" onclick="num(8)"></td>
                <td align="center" width="30"><input type="button" value="9"
                    class="button2" onclick="num(9)"></td>
                <td align="center" width="30"><input type="button" value="*"
                    class="button3" onclick="num('*')"></td>
                <td align="center"><input type="button"value="cos"
                    class="button4" onclick="cos(this.form.display)"></td>
            </tr>
            <tr>
                <td align="center" width="30"><input type="button" id="pnnum"
                    value="+/-" class="button3" onclick="change(this.form.display)"></td>
                <td align="center" width="30"><input type="button" value="0"
                    class="button2" onclick="num(0)"></td>
                <td align="center" width="30"><input type="button" id="point"
                    value="." class="button3" onclick="num('.')"></td>
                <td align="center" width="30"><input type="button" value="/"
                    class="button3" onclick="num('/')"></td>
                <td align="center" width="30"><input type="button"
                    value="tan" class="button4" onclick="tan(this.form.display)"></td>
            </tr>
 
        </table>
    </form>
</body>
</html>

결과는 밑과 같이 나옵니다!




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