Home >Web Front-end >JS Tutorial >Simple js calculator implementation

Simple js calculator implementation

高洛峰
高洛峰Original
2016-12-08 17:13:151258browse

The example in this article shares the js calculator implementation code for your reference. The specific content is as follows

<!DOCTYPE html>
 
<html>
 
 <head>
 
  <meta charset="utf-8"> 
 
  <title></title>
 
  </head>
 
  <body >
 
   <input type=&#39;text&#39; id=&#39;txt1&#39; />
 
   <select id=&#39;select&#39;>      
 
      <option value=&#39;+&#39;>+</option>
 
      <option value="-">-</option>
 
      <option value="*">*</option>
 
      <option value="/">/</option>
 
   </select>
 
   <input type=&#39;text&#39; id=&#39;txt2&#39; />
 
   <input type=&#39;button&#39; value=&#39; = &#39; onclick="count()"/>
 
   <!--通过 = 按钮来调用创建的函数,得到结果-->
 
   <input type=&#39;text&#39; id=&#39;fruit&#39; />
 
 </body>
 
  <script type="text/javascript">
 
   //制做简单计算器
 
     function count() {
 
      var txt1 = document.all.txt1.value;
 
      var txt2 = document.all.txt2.value;
 
      var s=document.all.select.value;
 
      var z;
 
      switch(s){
 
       case "+":                    z=parseFloat(txt1)+parseFloat(txt2);break;
 
      case "-":
 
          z=parseFloat(txt1)-parseFloat(txt2);break;
 
       case                  "*":z=parseFloat(txt1)*parseFloat(txt2);break;
 
      case         "/":z=parseFloat(txt1)/parseFloat(txt2);break;
 
  
 
  
 
        }
 
        document.getElementById("fruit").value=z;
 
  
 
       }
 
     </script>
 
  
 
</html>


Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn