Casting a Void Pointer to a Struct
I Started Feeling Comfortable with C and Then I Ran into Type Casting. If I Have the Following Defined in an *. H File Struct Data { Int Value; Char *Label; }...
I started feeling comfortable with C and then I ran into type casting. If I have the following defined in an *.h file
struct data {
int value;
char *label;
};
and this in another *.h file
# define TYPE void*
How do I cast the void pointer to the struct so that I can use a variable "TYPE val" that's passed into functions? For example, if I want to utilize the value that TYPE val points to, how do I cast it so that I can pass that value to another functions?
2 Answers
(struct data*)pointer
will cast a pointer to void to a pointer to struct data.
Typecasting void pointer to a struct can be done in following
void *vptr;
typedef struct data
{
/* members */
} tdata;
for this we can typecast to struct lets say u want to send this vptr as structure variable to some function
then
void function (tdata *);
main ()
{
/* here is your function which needs structure pointer
type casting void pointer to struct */
function((tdata *) vptr);
}
Note: we can typecast void pointer to any type, thats the main purpose of void pointers.
Sophia analyzes international trade, startup ecosystems, retail transformation, and supply chain logistics for modern digital publications.
