DaWei

Caveat: the recursive approach may use up your allotted stack before it uses up the memory you've alloted for the result. Most likely not for a factorial operation, though; the result grows rapidly, to indulge in an understatement.

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Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code.
Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers