cint与clng含义：
都可以强制将一个表达式转换成数据类型
cint与clng处理数据的范围：
CInt Integer -32,768 至 32,767，小数部分四舍五入。
CLng Long -2,147,483,648 至 2,147,483,647，小数部分四舍五入。
所谓溢出指的是超出处理数据的范围，下面代码是处理数据防止溢出的代码，大家可以自己看看：
'检测是否是短整数
复制代码 代码如下:
sub Is_Int(string)
if len(abs(string))>10 then response.write "数据溢出":response.end
if instr(string,"-")<1 then
if cint(left(string,4))>3276 and cint(right(string,1))>7 then response.write "数据溢出":response.end
else
if cint(left(abs(string),4))>3276 and cint(right(string,1))>8 then response.write "数据溢出":response.end
end if
end sub
if len(abs(string))>10 then response.write "数据溢出":response.end
if instr(string,"-")<1 then
if cint(left(string,4))>3276 and cint(right(string,1))>7 then response.write "数据溢出":response.end
else
if cint(left(abs(string),4))>3276 and cint(right(string,1))>8 then response.write "数据溢出":response.end
end if
end sub
'检测是否是长整数
复制代码 代码如下:
sub Is_Lng(string)
if len(abs(string))>10 then response.write "数据溢出":response.end
if instr(string,"-")<1 then
if clng(left(string,9))>214748364 and clng(right(string,1))>7 then response.write "数据溢出":response.end
else
if clng(left(abs(string),9))>21478364 and clng(right(string,1))>8 then response.write "数据溢出":response.end
end if
end sub
if len(abs(string))>10 then response.write "数据溢出":response.end
if instr(string,"-")<1 then
if clng(left(string,9))>214748364 and clng(right(string,1))>7 then response.write "数据溢出":response.end
else
if clng(left(abs(string),9))>21478364 and clng(right(string,1))>8 then response.write "数据溢出":response.end
end if
end sub