dim a,b
function abc(byval a,byref c)
a=a+1
b=b+1
c=c+a+b
abc=a*2
end function
a=5:b=10
response.write abc(a,b)
response.write ":" & a & ":" & b

刚学！不懂为什么response.write ":" & a & ":" & b 中b输出的值是28.......

要是把代码改成这样：
dim a,d
function abc(byval a,byref c)
a=a+1
b=b+1
c=c+a+b
abc=a*2
end function
a=5:d=10
response.write abc(a,b)
response.write ":" & a & ":" & d

d的输出值是多少？