计算器

演

示

源
代
码

计算器

注释：放在<body>与</body>之间

<table border=6 cellspacing=2 cellpadding=3>
                        <tr> 
                          <td valign=middle align=center colspan=9 bgcolor="yellow"> 
                            <font size=4 color="#800040"><b>超 级 计 算 器</b></font><font size=6 color="#800040"><b></b></font></td>
                        </tr>
                        <tr> 
                          <td valign=middle align=center colspan=6> 
                            <input type="text" name="list" size=22 value="Start Punching!">
                          </td>
                          <td valign=middle align=center colspan=3> 
                            <input type="button" name="alex" value="       CLEAR      " onClick="eraser()">
                          </td>
                        </tr>
                        <tr> 
                          <td valign=middle align=center colspan=6> 
                            <input type="text" name="display" size=22 value="">
                          </td>
                          <td valign=middle align=center colspan=2> 
                            <input type="button" name="alex" value="       =      " onClick="equal()">
                          </td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="  <--  " onClick="backer()">
                          </td>
                        </tr>
                        <tr> 
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="  1  " onClick="enter(1)">
                          </td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="  2  " onClick="enter(2)">
                          </td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="  3  " onClick="enter(3)">
                          </td>
                          <td></td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="   /   " onClick="calculate('/')">
                          </td>
                          <td></td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value=" sin " onClick="calc(1)">
                          </td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value=" x&#189; " onClick="calc(4)">
                          </td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="<->M" onClick="mem(0)">
                          </td>
                        </tr>
                        <tr> 
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="  4  " onClick="enter(4)">
                          </td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="  5  " onClick="enter(5)">
                          </td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="  6  " onClick="enter(6)">
                          </td>
                          <td></td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="   *   " onClick="calculate('*')">
                          </td>
                          <td></td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="cos" onClick="calc(2)">
                          </td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="  x&#178; " onClick="calc(7)">
                          </td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="--> M" onClick="mem(1)">
                          </td>
                        </tr>
                        <tr> 
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="  7  " onClick="enter(7)">
                          </td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="  8  " onClick="enter(8)">
                          </td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="  9  " onClick="enter(9)">
                          </td>
                          <td></td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="   -   " onClick="calculate('-')">
                          </td>
                          <td></td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="tan " onClick="calc(3)">
                          </td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="1/x " onClick="calc(6)">
                          </td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="<-- M" onClick="mem(-1)">
                          </td>
                        </tr>
                        <tr> 
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="  0  " onClick="enter(0)">
                          </td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="dot" onClick="enter('.')">
                          </td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value=" +|- " onClick="change()">
                          </td>
                          <td></td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="  +   " onClick="calculate('+')">
                          </td>
                          <td></td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value="  pi " onClick="pie()">
                          </td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value=" Ln " onClick="calc(5)">
                          </td>
                          <td valign=middle align=center> 
                            <input type="button" name="alex" value=" x^y  " onClick="calculate('p')">
                          </td>
                        </tr>
                        <tr> 
                        <tr> 
                          <td valign=middle align=center colspan=9></td>
                        </tr>
                        <tr> 
                          <td valign=middle align=center colspan=9> 
                            <input type="text" name="c1" size=4 value="">
                            &nbsp;*X&#178;&nbsp;+&nbsp; 
                            <input type="text" name="c2" size=4 value="">
                            &nbsp;*X&nbsp;+&nbsp; 
                            <input type="text" name="c3" size=4 value="">
                            &nbsp;=&nbsp;0&nbsp; 
                            <input type="button" name="alex" value="Solve" onClick="fsolve()">
                          </td>
                        </tr>
                      </table>

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