請幫忙完善圖中的bootstrap代碼 多謝
<div?class="input-group"> ????<div?class="input-group-btn"> ????????<button?type="button"?class="btn?btn-default">B</button> ????????<button?type="button"?class="btn?btn-default">I</button> ????</div> ????<input?type="text"?class="form-control"?aria-label="..."> </div> 錯誤范例：兩個按鈕不在同一行上
2017-05-05
<div?class="input-group">
????<div?class="input-group-btn">
????????<button?type="button"?class="btn?btn-default">B</button>
????????<button?type="button"?class="btn?btn-default">I</button>
????</div>
????<input?type="text"?class="form-control"?aria-label="...">
</div>