<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<link rel = "stylesheet" href = "../css/mystyle.css" type="text/css">
<script>
function proc1(){
//입력
su1 = parseInt(prompt("수1입력"));
su2 = parseInt(prompt("수2입력"));
add(su1, su2);
document.getElementById('result1').innerHTML = "합=" + sum + "<br>";
a=sub(su1, su2);
//sub함수내에서 실행된 결과를 res로 전달 받는다
document.getElementById('result1').innerHTML += "차=" + a;
}
function add(a, b){
sum = a + b;/*var을 빼야 결과가 나옴*/
}
function sub(a,b){
var sub = a - b;
return sub;
}
</script>
</head>
<body>
<div class = "box">
<br>
<button type = "button" onclick="proc1()">확인</button>
<div id = "result1"></div>
</div>
</body>
</html>
신입 개발자 입니다!!!