"Martin Ettl" <ettl.martin@xxxxxx> writes: > i was not aware of -Wconversion flag. Never the less i was wondering > that this code was compilable. Because, allocting a negative amount of > memory does not make senense. Anyway, thanks for the help. Since the value is unsigned, you aren't allocating a negative amount of memory. The -100 is implicitly converted to an unsigned value (on a 32-bit machine, 0xffffff9c). You are actually trying to allocate a very large amount of memory, which won't work, but isn't nonsensical. -Wconversion warns about the implicit convertsion of the negative integer to an unsigned type. Ian
