Question

Here is my code:
 <!DOCTYPE html>
<HTML>
<HEAD>
<script>

var a,b,result;

function setValues()
{
a = Number(document.getElementById("a").Value);
b = Number(document.getElementById("b").Value);
}

function sum()
{
setValues();
result = a+b;
alert("The Sum For The Values Is "+result);
}

function multiply()
{
setValues();
result = a*b;
alert("The Product For The Values Is "+result);
}

function div()
{
setValues();
result = a/b;
alert("The Quotient For The Values Is "+result);
}

</script>

</HEAD>


<STYLE>
body
{
background-color: #b0c4de;
}

 </STYLE>

 <body>
 <CENTER>
 <H1><B><U> Fun Facts!</B></U></H1>
 <H4>Did You Know There Are Over 7 Billion People In The World!!!</H4>
 <div>
 <input Id="a" Type="Text"/>
 <input Id="b" Type="Text"/>
 <input Type="Button"  onclick="sum()" Value="sum"/>
 <input Type="Button"  onclick="multiply()" Value="multiply"/>
 <input Type="Button"  onclick="div()" Value="divide"/>
 </div>
 </body>



 </CENTER>






</HTML>

这是一个简单的计算器，但是当我点击um，乘以或除以时，我得到“NaN错误。我添加警报系统，所以答案是总和，产品或商，然后答案，但我要听警报系统，但结果我得到了NaN 请帮忙。谢谢

 <!DOCTYPE html>
    <HTML>
    <HEAD>
    <script>

    var a,b,result;

    function setValues()
    {
    a = Number(document.getElementById("a").Value);
    b = Number(document.getElementById("b").Value);
    }

    function sum()
    {
    setValues();
    result = a+b;
    alert("The Sum For The Values Is "+result);
    }
 
    function multiply()
    {
    setValues();
    result = a*b;
    alert("The Product For The Values Is "+result);
    }

    function div()
    {
    setValues();
    result = a/b;
    alert("The Quotient For The Values Is "+result);
    }

    </script>

    </HEAD>


    <STYLE>
    body
    {
    background-color: #b0c4de;
    }

     </STYLE>

     <body>
     <CENTER>
     <H1><B><U> Fun Facts!</B></U></H1>
     <H4>Did You Know There Are Over 7 Billion People In The World!!!</H4>
     <div>
     <input Id="a" Type="Text"/>
     <input Id="b" Type="Text"/>
     <input Type="Button"  onclick="sum()" Value="sum"/>
     <input Type="Button"  onclick="multiply()" Value="multiply"/>
     <input Type="Button"  onclick="div()" Value="divide"/>
     </div>
     </body>



     </CENTER>






    </HTML>

Answer 1

你有一个简单的错误：

function setValues()
{
a = Number(document.getElementById("a").Value);
b = Number(document.getElementById("b").Value);
}

.Value应为.value ...

来自奥地利的问候

Working Fiddle

当我点击总和时，乘以除数按钮我得到“NaN”错误

1 个答案: