ul-isu/index.html at main · 1top10000/ul-isu · GitHub

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<!DOCTYPE html>
<html>
<head>
    <title>아잉</title>
    <style>
        .hf29 {
            resize: none;
        }
    </style>
</head>
<body>
    <script>
        function e() {
            if (document.querySelector(".g9cy").querySelector("#h") != null) {
                document.querySelector(".g9cy").querySelector("#h").remove();
            }
            var p = document.body.querySelector('.hf29').value.trim().replace(/ /g, '').replace(/\n/g, '');
            const c = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "+", "-", "/", "*", ".", "(", ")"];
            const q = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"];
            const x = ["+", "-", "/", "*", "."];
            var e = false;
            if ((p.split('=').length - 1) == 1) {
                if (p[p.length - 1] != '=') {
                    e = true;
                }
            } else if((p.split('=').length - 1) != 0) {
                e = true;
            }
            const t = p.replace("=", '');
            var g = 0;
            for (let i = 0; i < t.length; i++) {
                if (c.includes(t[i]) == false) {
                    e = true;
                    break;
                }
                if (i != 0) {
                    if ((x.includes(t[i - 1]) == true) && (x.includes(t[i]) == true)) {
                        e = true;
                        break;
                    }
                    if ((t[i] == ")") && (x.includes(t[i - 1]) == true)) {
                        e = true;
                        break;
                    }
                    if ((t[i] == "(") && (q.includes(t[i - 1]) == true)) {
                        e = true;
                        break;
                    }
                }
                if (i != t.length-1) {
                    if ((t[i] == "(") && (x.includes(t[i + 1]) == true)) {
                        e = true;
                        break;
                    }
                    if ((t[i] == ")") && (q.includes(t[i + 1]) == true)) {
                        e = true;
                        break;
                    }
                }
                if (t[i] == "(") {
                    g++;
                }
                if (t[i] == ")") {
                    if (g == 0) {
                        e = true;
                        break;
                    }
                    g--;
                }
            }
            if (g != 0) {
                e = true;
            }
            if (x.includes(t[0]) == true) {
                e = true;
            }
            if (e == true) {
                r();
            }
        }
        function r() {
            const d = document.createElement("div");
            d.id = "h";
            d.innerText = "r";
            document.querySelector(".g9cy").appendChild(d);
        }
    </script>
    <textarea cols="30" rows="10" class="hf29">1+1=</textarea><br>
    <div class="g9cy"></div>
    <button onclick="e()">확인</button><br>
</body>
</html>