javascript/ex07.html at master · sangmin0816/javascript · 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>Document</title>
</head>
<body>
    <ul class="lst" id="lst1">
        <li class="item">80</li>
        <li class="item">100</li>
        <li class="item">90</li>
        <li class="item">95</li>
        <li class="item">85</li>
    </ul>

    <hr>
    <div id="tot">총점: </div>
    <div id="avg">평균: </div>
    <div id="pan">판정: </div>
    <div id="hak">학점: </div>
    <div id="remark">참고사항: </div>
    <div id="sang">과목우수상: </div>
    <br>
    <div class="btn-group">
        <button type="button" style="width: 100px; height: 50px;" onclick="compute()">계산</button>
    </div>

    <script>
        function compute(){

            var items = document.querySelectorAll(".lst .item");
            var total = document.getElementById("tot");
            var total_n = 0;
            for(var i=0; i<items.length; i++){
                total_n += parseInt(items[i].innerText);
            }
            total.innerHTML += total_n;

            var avg = document.getElementById("avg");
            var avg_n = total_n/5;

            avg.innerHTML += avg_n;

            var pan = document.getElementById("pan");
            var flag = (avg_n>=70)? true: false;
            if(flag){
                for(var i=0; i<items.length; i++){
                    if(parseInt(items[i].innerText)<80){
                        flag = false
                        break;
                    }
                }
            }
            var pan_n = (flag)? "합격": "불합격";
            pan.innerHTML += pan_n;

            var hak = document.getElementById("hak");
            var remark = document.getElementById("remark");

            var hak_n = "F";
            var remark_n = "재평가";
            switch(avg_n/10){
                case 9:
                    hak_n = "A";
                    remark_n = "고득점";
                    break;
                case 8:
                    hak_n = "B";
                    remark_n = "우수";
                    break;
                case 7:
                    hak_n = "C";
                    remark_n = "보통";
                    break;
            }

            hak.innerHTML+=hak_n;
            remark.innerHTML+=remark_n;

            var sang = document.getElementById("sang");
            var sang_n = "해당없음";
            for(var i=0; i<items.length; i++){
                if(parseInt(items[i].innerText)==100){
                    sang_n = "과목우수";
                    break;
                }
            }

            sang.innerHTML+=sang_n;

        }

    </script>
</body>
</html>