代码如下:
<!doctype html>
<html>
<meta name=content-type content="text/html; charset=gbk"'+')
style=height: 70px; width: 90px; font-size: 35px>
</td>
</tr>
<tr>
<td>
<input type=button value=4 id=4 onclick=onclicknum(4)
style=height: 70px; width: 90px; font-size: 35px>
</td>
<td>
<input type=button value=5 id=5 onclick=onclicknum(5)
style=height: 70px; width: 90px; font-size: 35px>
</td>
<td>
<input type=button value=6 id=6 onclick=onclicknum(6)
style=height: 70px; width: 90px; font-size: 35px>
</td>
<td>
<input type=button value=- id=sub onclick=onclicknum('-')
style=height: 70px; width: 90px; font-size: 35px>
</td>
</tr>
<tr>
<td>
<input type=button value=7 id=7 onclick=onclicknum(7)
style=height: 70px; width: 90px; font-size: 35px>
</td>
<td>
<input type=button value=8 id=8 onclick=onclicknum(8)
style=height: 70px; width: 90px; font-size: 35px>
</td>
<td>
<input type=button value=9 id=9 onclick=onclicknum(9)
style=height: 70px; width: 90px; font-size: 35px>
</td>
<td>
<input type=button value=* id=mul onclick=onclicknum('*')
style=height: 70px; width: 90px; font-size: 35px>
</td>
</tr>
<tr>
<td colspan=2>
<input type=button value=0 id=0 onclick=onclicknum(0)
style=height: 70px; width: 190px; font-size: 35px>
</td>
<td>
<input type=button value=. id=point onclick=onclicknum('.')
style=height: 70px; width: 90px; font-size: 35px>
</td>
<td>
<input type=button value=/ id=division
onclick=onclicknum('/')
style=height: 70px; width: 90px; font-size: 35px>
</td>
</tr>
<tr>
<td colspan=2>
<input type=button value=del id=clear
onclick=onclickclear()
style=height: 70px; width: 190px; font-size: 35px />
</td>
<td colspan=2>
<input type=button value== id=result
onclick=onclickresult()
style=height: 70px; width: 190px; font-size: 35px />
</td>
</tr>
</table>
</body>
</html>
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