C structure declarations examples

Some Structure Declarations and It’s Meaning :

struct
 {
    int length;
    char *name;
}*ptr;

Suppose we initialize these two structure members with following values -

length = 30;
*name  = "programming";

Now Consider Following Declarations one by One -

Example 1 : Incrementing Member

++ptr->length

1. “++” Operator is pre-increment operator.
2. Above Statement will increase the value of “length“

Example 2 : Incrementing Member

(++ptr)->length

1. Content of the length is fetched and then ptr is incremented.

Consider above Structure and Look at the Following Table :-

Expression	Meaning
++ptr->length	Increment the value of length
(++ptr)->length	Increment ptr before accessing length
(ptr++)->length	Increment ptr after accessing length
*ptr->name	Fetch Content of name
*ptr->name++	Incrementing ptr after Fetching the value
(*ptr->name)++	Increments whatever str points to
*ptr++->name	Incrementing ptr after accessing whatever str points to