html5 外链式实现加减乘除 

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>加减乘除</title>
        <script src="a.js"></script>//引用js
    </head>
    <body>
        <p>a=3,b=2;</p>
        <input type="button" onclick="alert(sum(3,2))" value="加" />
        <input type="button" onclick="alert(jian(3,2))" value="减" />
        <input type="button" onclick="alert(cheng(3,2))" value="乘" />
        <input type="button" onclick="alert(chu(3,2))" value="除" />
    </body>
</html>

js代码：

function sum(a,b){
    var c;
    c=a+b;
    return c;
}
function jian(a,b){
    var c;
    c=a-b;
    return c;
}
function cheng(a,b){
    var c;
    c=a*b;
    return c;
}
function chu(a,b){
    var c;
    c=a/b;
    return c;
}

 

posted @ 2019-09-04 10:08  痞卡皮  阅读(759)  评论(0)  编辑  收藏  举报