函數(shù)調(diào)用的元素可以是變量嗎？
為什么運行沒有結(jié)果?
<!DOCTYPE?HTML>
<html>
<head>
<meta?http-equiv="Content-Type"?content="text/html;?charset=utf-8"?/>
<title>返回值函數(shù)</title>
<script?type="text/javascript">
??function??app2(x,y)
??{?var?sum,x,y;
????sum?=?x?*?y;
????return?sum;
??}
?var?req1=add2(5,6);
?var?req2=add2(2,3);
var?sumq=add2(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>
2017-02-09
add2函數(shù)未定義
2017-02-09
你把add2換成app2再試試。
2017-02-09
函數(shù)名寫錯了
2017-02-09
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>返回值函數(shù)</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>