Yes, in C a plain int i; at file scope is a tentative definition - if, by the end of the compilation unit, no definition has been seen, one of them will bec

Yes, in C a plain int i; at file scope is a tentative definition - if, by the end of the compilation unit, no definition has been seen, one of them will become a definition, otherwise it is just a declaration. On the other hand, this: int i = 0; is a definition, and you can't have two of those.