Em 22/7/2010 16:28, alan.b.pearce@stfc.ac.uk escreveu:
> Note that the variables declared inside each function are not declared
> 'static' so each time the function gets called they are recreated on the
> stack, and are unique to that function. So the variables inside OpenSPI1
> are different variables to OpenSPI2, even though they have the same
> name. The scope of each name is limited to the code inside that
> function. The variables are cleared to all zeros on creation on the
> stack if I understand the C standard correctly, but may need correction

No, automatic variables are not cleared upon function entry, they may
contain garbage.

Global variables are cleared to zero at program start, but some
tool-chains support a switch
to disable this feature.

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