コード:
#prompt
Dim s(3) As String
Dim n As Long, i As DWord
Dim max As Long
s(0) = "UnitSet30"
s(1) = "UnitSet666"
s(2) = "UnitSet9"
'最大値
for n=0 to 2
i = Val(Mid$(s(n), 8))
if i > max Then max = i
next
print max
'更新
for n=0 to 2
i = Val(Mid$(s(n), 8)) + 1
s(n) = "UnitSet" + Str$(i)
next