Datasheet

Accessing Nested Structures
If the structure B contains a field whose type is the structure A, the members of A
can be accessed by two applications of the member selectors:
struct A {
int j; double x;
};
struct B {
int i; struct A aa; double d;
} s, *sptr;
...
s.i = 3; // assign 3 to the i member of B
s.aa.j = 2; // assign 2 to the j member of A
sptr->d = 1.23; // assign 1.23 to the d member of B
sptr->aa.x = 3.14; // assign 3.14 to x member of A
Structure Uniqueness
Each structure declaration introduces a unique structure type, so that in
struct A {
int i,j; double d;
} aa, aaa;
struct B {
int i,j; double d;
} bb;
the objects aa and aaa are both of the type struct A, but the objects aa and bb are
of different structure types. Structures can be assigned only if the source and desti-
nation have the same type:
aa = aaa; /* OK: same type, member by member assignment */
aa = bb; /* ILLEGAL: different types */
/* but you can assign member by member: */
aa.i = bb.i;
aa.j = bb.j;
aa.d = bb.d;
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MIKROELEKTRONIKA - SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD
Language Reference
mikroC PRO for AVR
CHAPTER 5