為什么沒效果呢？？？？？求指教
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>返回值函數</title>
<script type="text/javascript">
? function ?app2(x,y)
? { var sum,x,y;
? ? sum = x * y;
return sum;
? }
?var req1 = sum(5,6);
?var req2 = sum(2,3);
?var sumq = req1+req2;
document.write("req1的值:"+req1+"<br/>");
document.write("req2的值:"+req2+"<br/>");
document.write(req1+"與"+req2+"和:"+sumq);
</script>
</head>
<body>
</body>
</html>
2016-07-24
2016-07-24
函數名是app2 調用的時候是sum?
var req1 = sum(5,6);
?var req2 = sum(2,3);