mikroElektronika PIC Microcontrollers PIC12 User Manual page 85

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making it simple...
Structure Member Access
Structure and union members are accessed using the following two selection oper-
ators:
(period)
.
->
The operator
one of the structure's members. Suppose that the object
if
m
s.m
is of type
The operator
ps
expression
ps->m // indirect access to member m;
is of type
convenient shorthand for
For example:
struct mystruct {
int i; char str[10]; double d;
} s, *sptr = &s;
s.i = 3;
sptr -> d = 1.23;
The expression
type. The expression
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(right arrow)
is called the direct member selector and it is used to directly access
.
is a member identifier of type
// direct access to member m
, and represents the member object
M
is called the indirect (or pointer) member selector. Suppose that
->
is a pointer to . Then if
s
// identical to (*ps).m
, and represents the member object m in
M
(*ps).m
.
.
.
// assign to the i member of mystruct s
// assign to the d member of mystruct s
is an lvalue, provided that
s.m
sptr->m
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declared in , the expression
M s
in
m
is a member identifier of type
m
.
is an lvalue and
s
is an lvalue unless
m
is of struct type
s
.
s
declared in
M
. The expression
s ps->m
is not an array
m
is an array type.
. Then
S
, the
s
is a
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