Untitled

<div class="input-row">
      <input type="text" placeholder="Search"><button class="btn" >重发</button>
 </div>

<html>
  <body>
    <div style="width: 1000px; height: 600px; border: 1px solid red; position: absolute">
      <input type="text" placeholder="Search" style="float: left">

      <button style="float:right">MyButton</button>
    </div>
  <body>
</html>

<div class="input-row">
    <div style="float:left;">
        <input type="text" placeholder="Search">
    </div>
    <div style="float:right;">
        <button class="btn" >重发</button>
    </div>
</div>