[Koshkin]

Incidentally, the classic C did not have 'void'; instead, it was assumed that any function would, by default, return 'int' in the form of some value stored in the accumulator, and so the "value" of 'void' would be effectively represented by random garbage. The 'void' that was introduced explicitly in a later version of C weakened the original meaning of the unknown value by allowing pointers to 'void' and thus not requiring that the value pointed to must be always thought of as meaningless (since you could cast a pointer to void to a pointer to something else).