C expects one expression ?

[Sieira]

I hope you understand my poor english

This is my function (it used to return int), I got the same error when I compiled it for first time (then it was in the ***** marked line), so I started to comment one by one trying to allocate my fault... i couldn't:

void manage_data( TEntity * inEntity, TState inFromState, TEvent inEvent, TEventArgs * inArgs )
{
//    arguments *auxArgs;
//    int rc = AUTOMAT_OK;
//    char aux[4];
 
//    auxArgs=inArgs;
//    auxArgs->trama.flag_s = 62;
/*    auxArgs->trama.address = 0x69;
//    auxArgs->trama.control = 4;
 
//    memset(auxArgs->trama.data,'\0',MAX);
//    strcpy(auxArgs->trama.data,auxArgs->paquete.data);
*****    //si cabe n, se incluye en la trama
 
    if (strlen(auxArgs->trama.data)<256)//261-(num(4)+ ~(1) + '/0'(1))
    {
        strcat(auxArgs->trama.data,"~");//se escribe una virgulilla
        snprintf(aux,4,"%d",auxArgs->paquete.n);//se almacena el número de caracteres leídos
        strcat(auxArgs->trama.data,aux);
    }
    strcat(auxArgs->trama.data,"\0");
 
    auxArgs->trama.FCS1 = 0;
    auxArgs->trama.FCS2 = 0;
    auxArgs->flag_e = 62;    
*/
 // return rc;
}

----------------------------------------------------------------------
"$gcc -g -Wall -ansi -I . TX_automat_SW.c" returns:


TX_automat_SW.c: In function ‘manage_data’:
TX_automat_SW.c:83: error: expected expression before ‘/’ token
TX_automat_SW.c:84: error: expected expression before ‘/’ token
TX_automat_SW.c:85: error: expected expression before ‘/’ token
TX_automat_SW.c:87: error: expected expression before ‘/’ token
TX_automat_SW.c:88: error: expected expression before ‘/’ token
TX_automat_SW.c:108: error: expected expression before ‘/’ token


I just can't figure what is it expecting...

[Sieira]

By the way.

Other functions have the same header

type name( TEntity * inEntity, TState inFromState, TEvent inEvent, TEventArgs * inArgs )

and work properly

[Savage]

By the way.

Other functions have the same header

type name( TEntity * inEntity, TState inFromState, TEvent inEvent, TEventArgs * inArgs )

and work properly

Void functions cannot return a value.

If u wish to return a int make a function type to be a int.

Savage

[Sieira]

Void functions cannot return a value.

If u wish to return a int make a function type to be a int.

Savage

Function returns int, I wrote void because I commented the return instruction too.

OK, by deleting every single-line comment, i got it working.

Can anyone explain me it?



That .c file implements his homonym .h, which is as follows:
___________________________________

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
 
#include <IFTI_P2_automat.h>
 
#define    REACHED_EOF        3
#define MAX 261
 
 
typedef struct{
     char data[MAX];
     int n;
}packet;
 
typedef struct
{
     char flag_s;
     char address;
     unsigned char control;
     char data[MAX];
     unsigned char FCS1;
     unsigned char FCS2;
     char flag_e;
}frame;
 
typedef struct{
    frame trama;
    packet paquete;
    FILE* file;
    int tty;
}arguments;
 
 
/* ------------------------------------------------------------ 
 * State definitions
 * ------------------------------------------------------------ */
enum {
    TX_STATE_INITIAL = AUTOMAT_INITIAL_STATE,
    TX_STATE_ERROR,
    TX_STATE_READING,
    TX_STATE_FRAMING,
    TX_STATE_WAITING
};
 
#define TX_STATE_TEXT(X) \
(X==TX_STATE_INITIAL)? "TX_STATE_INITIAL" : \
(X==TX_STATE_ERROR)? "TX_STATE_ERROR" : \
(X==TX_STATE_READING)? "TX_STATE_READING" : \
(X==TX_STATE_FRAMING)? "TX_STATE_FRAMING" : \
(X==TX_STATE_WAITING)? "TX_STATE_WAITING" : \
"UNDEF"
 
 
/* ------------------------------------------------------------ 
 * Event definitions
 * ------------------------------------------------------------ */
enum {
  TX_EV_OPERATIVE = 1,
  TX_EV_READOK,
  TX_EV_FRAMED,
  TX_EV_ACK_RECEIVED,
};
 
/* ------------------------------------------------------------ 
 * Action definitions
 * ------------------------------------------------------------ */
TAutomat * TX_automat_SW_define( );
 
int internal_error(    TEntity * inEntity,
            TState inFromState,
            TEvent inEvent,
            TEventArgs * inArgs );
 
int read_data(    TEntity * inEntity,
            TState inFromState,
            TEvent inEvent,
            TEventArgs * inArgs );
 
int manage_data(    TEntity * inEntity,
            TState inFromState,
            TEvent inEvent,
            TEventArgs * inArgs );
 
int send_data_wait_response(    TEntity * inEntity,
            TState inFromState,
            TEvent inEvent,
            TEventArgs * inArgs );
 
 
 

________________________
Thanks for your attention

[Savage]

I think that's becasue ur comment styles.

U are mixing c and c++ commenting styles

Savage

[Banfa]

I think that's becasue ur comment styles.

U are mixing c and c++ commenting styles

Mixing them is OK, although possibly bad practice, I suspect it is because they are nested.

i.e.

/* Look I have started a multi-line comment
 
 
// and now I have put in a single line comment
 
and now I am ending the multi-line comment */
 

It is never a good idea to nest comments, confusion results.

[Savage]

Mixing them is OK, although possibly bad practice, I suspect it is because they are nested.

i.e.

/* Look I have started a multi-line comment
 
 
// and now I have put in a single line comment
 
and now I am ending the multi-line comment */
 

It is never a good idea to nest comments, confusion results.

So, as we can see it's not OK.

Savage

[Sieira]

I found my mistake.

It's possible to mix this type of comments (i've done it so many times),
you can do it, but if you do, you can't try to compile using the -ansi flag in gcc...

Anyway, i'll try not to do it again. Thank you for your replies