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哪出錯了，運行不出來

<!DOCTYPE? HTML>
<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>函數(shù)</title>

<script type="text/javascript">

//定義函數(shù)
??? function big(x,y)
??? {
??????? if(x>y)
??????? {
??????????? return x;
????????? ?
??????? }
??????? else(x==y)
??????? {
??????????? var s="一樣大";
??????????? return s;
??????? }
??????? else
??????? {
??????????? return y;
????????? ?
??????? }
??? }

?var n=big(5,4);
?var n1=big(6,3);

//函數(shù)體，判斷兩個整數(shù)比較的三種情況
? ?

?
//調(diào)用函數(shù)，實現(xiàn)下面兩組數(shù)中，返回較大值。
? document.write(" 5 和 4 的較大值是:"+n+"<br>");
? document.write(" 6 和 3 的較大值是:"+n1 );

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

唯爾半截湘妃

2016-05-12

源自：JavaScript進階篇 5-6

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2 回答

Kait
2016-05-15

你的if..else..嵌套語句應該寫的有問題.你可以這樣寫:

function?big?(x,y)?{
????if?(x-y>0)?{
????????return?x;
????}?else?if?(x-y<0)?{
????????return?y;
????}?else?{
????????return?"相等";
????}??
}

var?sup1?=?big(5,4);
var?sup2?=?big(6,3);

document.write("?5?和?4?的較大值是:"+sup1+"<br/>");
document.write("?6?和?3?的較大值是:"+sup2);