User manual

mikroC PRO for PIC32
MikroElektronika
215
Accessing Nested Structures
If the structure B contains a eld 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 destination 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;