<form?action="#">
????第一個數：<input?type="text"?value=""?id="num1"/><br/>
????第二個數：<input?type="text"?value=""?id="num2"/><br/><br/>
????<input?type="button"?value="+"?class="btn"?onclick="numS('+')"/>
????<input?type="button"?value="-"?class="btn"?onclick="numS('-')"/>
????<input?type="button"?value="*"?class="btn"?onclick="numS('*')"/>
????<input?type="button"?value="/"?class="btn"?onclick="numS('/')"/>
????<br/>
????計算結果：<input?type="text"?id="result"?value=""/>
</form>
<script>
????function?numS(value){
????????var?num1=document.getElementById('num1').value;
????????var?num2=document.getElementById('num2').value;
????????switch?(value){
????????????case?"+":
????????????????document.getElementById('result').value=num1+num2;
????????????????break;
????????????case?"-":
????????????????document.getElementById('result').value=num1-num2;
????????????????break;
????????????case?"*":
????????????????document.getElementById('result').value=num1*num2;
????????????????break;
????????????case?"/":
????????????????document.getElementById('result').value=num1/num2;
????????????????break;
????????}
????}
以上是全部代碼，在輸入第一個值和第二個值之后點擊+-*、按鈕不能自行計算得出結果
做一個簡單的計算器的效果但是不能計算？
語兮
2016-08-29 16:54:14
