how to detect an overflow?

[ohadbp]

hello,

i m creating a calculator in 16 bit. how can i detect an overflow in run time?

ohad

[cksiow]

one way is to use larger data type to store the result and check for overflow. for instance,


dim i as integer
dim j as integer
dim l as long

l = i + j

if l > 32767 then
'overflow
end




second way, use On Error Goto ....

[vbcode]
On Error Goto ErrorTrap
dim i as integer
dim j as integer
dim k as integer

k = i + j

exit function
ErrorTrap:

'if k overflow, this part of code will be executed ...



HTH

cksiow
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