Question

C99 gcc

I keep getting this error. I have a struct outside main. And inside main I am trying to allocate on the stack using calloc. I can’t seem to find out what is wrong.

Thanks for any advice,

error: expected expression before ‘)’ token

/* global */ struct port_data_t                                                                       {                                                                                            size_t task_id;                                                                          pthread_t *thread_id;                                                                    size_t start_port;                                                                       size_t number_ports;                                                                 } *port_data;                                                                              /* main function */ struct port_data_t *port_data = (struct task_data_t*) calloc(4, sizeof(port_data*)); 

Answer 1

Should be calloc(4, sizeof(*port_data)): Note * before var name.