cint與clng含義:
都可以強(qiáng)制將一個(gè)表達(dá)式轉(zhuǎn)換成數(shù)據(jù)類型
cint與clng處理數(shù)據(jù)的范圍:
CInt Integer -32,768 至 32,767,小數(shù)部分四舍五入。
CLng Long -2,147,483,648 至 2,147,483,647,小數(shù)部分四舍五入。
所謂溢出指的是超出處理數(shù)據(jù)的范圍,下面代碼是處理數(shù)據(jù)防止溢出的代碼,大家可以自己看看:
'檢測是否是短整數(shù)
代碼如下:
sub Is_Int(string)
if len(abs(string))>10 then response.write "數(shù)據(jù)溢出":response.end
if instr(string,"-")<1 then
if cint(left(string,4))>3276 and cint(right(string,1))>7 then response.write "數(shù)據(jù)溢出":response.end
else
if cint(left(abs(string),4))>3276 and cint(right(string,1))>8 then response.write "數(shù)據(jù)溢出":response.end
end if
end sub
'檢測是否是長整數(shù)
代碼如下:
sub Is_Lng(string)
if len(abs(string))>10 then response.write "數(shù)據(jù)溢出":response.end
if instr(string,"-")<1 then
if clng(left(string,9))>214748364 and clng(right(string,1))>7 then response.write "數(shù)據(jù)溢出":response.end
else
if clng(left(abs(string),9))>21478364 and clng(right(string,1))>8 then response.write "數(shù)據(jù)溢出":response.end
end if
end sub
該文章在 2022/6/21 16:13:51 編輯過