Structure in C

divya_flora · 09-29-2008, 01:50 AM

Hi Everyone....
I have a structure:
typedef struct
{
unsigned char command;
unsigned char data_length;
char data[MAX_DATA_LENGTH];
}PACKET;

My problem is that,I want to use a function here...
When i assign values to these variables they are as:
COMMAND,20,'S'...........
I want to call a function here..or assign a function value here........
as,
COMMAND,20,make().........

is it possible to do so...

Thanks ...
Divya

jf.argentino · 09-29-2008, 02:46 AM

Hi,
Yes it's possible, you have to use a pointer on function, something like

Code:

struct Packet {
    int (*do_command) (arg);
    unsigned char data_length;
    char data [MAX_DATA_LENGTH];
};

int my_command (arg) {
   /* Do what you want */
}

int main (void) {
   struct Packet packet;
   packet.do_command = my_command;
   /* ... */
}