如何编写一个加法器？
<form action="./calculation.asp">
<input type="text" size="1" name="op1 value=<%response.write request("op1")%>>
<input type="submit" name="operation value="plus">
<input type="text" size="1" name="op2 value=<%response.write request("op2")%>>
equals
<%
dim result
if request("operation") = "plus" then
result = clng(request("op1")) + clng(request("op2"))
else
result = "?"
end if
response.write result
%>
</form>