[Rd] dynamic array output by .C

Greetings,

I am building a stochastic simulation model in a C++ shared library for R. My model will generate a random number of new observations and also delete some old observations, however, the numbers cannot be predicted before the computation engine runs. For simplicity, I am trying to control my programming at the second stage (pure C++ for R). It seems .C accepts fixed size of arrays as input (also ouput), can I modify size of array for deleting old and adding new observations in .C?
Thanks in advance.

-- 
I am Tib, not Rob.

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