javascript_practice/calculator4.html at master · beaver84/javascript_practice · GitHub

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<!DOCTYPE html>
<html lang="ko">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <h1>문자열 계산기 구현하기</h1>
    <div id="output"></div>


    <script>
        function main(){

            var n1 = Number(prompt("첫번째 숫자를 입력해 주세요."));
            var out = document.getElementById('output');

            var op, n2;

            var result = n1;
            var n = 2;
            while(true){
                op = prompt("연산자를 입력해 주세요.");

                if (op === 'q'){
                    break;
                }
                n2 = Number(prompt(n + "번째 숫자를 입력해 주세요."));

                if (op === '+'){
                    result += n2;
                }else if(op === '-'){
                    result -= n2;
                }else if(op === '*'){
                    result *= n2;
                }else if(op === '/'){
                    result /= n2;
                }else {
                    result = "중간오류";
                    break;
                }
                n++;
            }


            out.innerHTML = "최종결과값은 " + result + " 입니다.";
        }
        main();

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