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為什么提交出錯？

<!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=app2(5,6);
?var?req2=app2(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>

黑夜間學html

2015-04-14

源自：JavaScript進階篇 5-5

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2 回答

smile_again
2015-05-08

<!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;
??}
?req1?=?app2(5,6);
?req2?=?app2(2,3);
?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>

不用var，還有空格也要注意。。。