struct t{};
int main(){
struct t a,b,c;
int l;
printf("%u %u %u %u\n",&a,&b,&c,&l);
}
o/p
3213845680 3213845680 3213845680 3213845676
a,b,c all are pointing to same location, so no space is allocated to them.
As i already mentioned, "*may be*" . I dont know what standard says about it
or rather i havent come across any such reference. These are just my
thoughts on why it must be mandatory to allocate space for structs in c++ (
so as to relate corresponding funciton of an object to unique object which
in identified by its address.)
Apart sizeof() tell u the space required by that "type" which is completely
consistent in case above ( 0 space).
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