read output data

[KillGabio]

Hi guys, im here with a pure C++ question. Im working with String message passing. Here is a sample code:

strcpy (comando, "Æ" FS "2");
    printf ("Comando: %s\n", comando);
    MandaPaqueteFiscal (handler, comando);
    UltimaRespuesta (handler, buffer);
    printf ("Respuesta: %s %s", buffer);

strcpy (comando, "Æ" FS "2");
    printf ("Comando: %s\n", comando);
    MandaPaqueteFiscal (handler, comando);
    UltimaRespuesta (handler, buffer);
    printf ("Respuesta: %s %s", buffer);

To copy to clipboard, switch view to plain text mode 

FS is the value to sepparate the fields: (It is used in an example howto of the printer)

#define FS "\x1c"

The documentation says that "UltimaRespuesta" stores in buffer a 50 byte word like this:

• Status of the printer (4 bytes)
• Field Separator {FS} (1 byte)
• Status Fiscal (4 bytes)
• FS (1 byte)
• Text (40bytes)

An example answer for the first 3 fields could be (as the documentation explains): C080 FS 0600.. that meaning it uses hexa values for the answer.
The thing is that when i look at the application output i recieve the following text:

Comando: Æ2
Respuesta: 

if i run it in debug mode
or:

Comando: Æ2
Respuesta: 0S?

if I just run the program....

So my question is, how can i read the "0S?" in a way i can interpret it?

I appreciate all the help thank u all in advance

[wysota]

Assuming proper byte ordering and length of integer as 32 bits:

unsigned char message[50]; // your message here
int status;
int statusFiscal;
char text[41];
memcpy(&status, message, 4);
memcpy(&statusFiscal, message+5);
memcpy(text, message+10, 40);
text[40] = '\0';
printf("status: %d\nfiscal: %d\ntext:%s\n", status, statusFiscal, text);

unsigned char message[50]; // your message here
int status;
int statusFiscal;
char text[41];
memcpy(&status, message, 4);
memcpy(&statusFiscal, message+5);
memcpy(text, message+10, 40);
text[40] = '\0';
printf("status: %d\nfiscal: %d\ntext:%s\n", status, statusFiscal, text);

To copy to clipboard, switch view to plain text mode 

[KillGabio]

I think your answer to my "problem" is correct, the thing is that i`m working with an emulator of a printer so that might be the problem of "extrange output". I`m receiving the warning: too many arguments for format while trying to execute:

printf ("Respuesta: %s", buffer);

this is something i should ignore?

[wysota]

The code seems correct. At least if you're using a regular compiler. What is the type of "buffer"? Is this your actual code? In your first post you have two %s marks in the line concerning "buffer".

[KillGabio]

Yes i had two separators, i was just trying to test what happened. The code posted is a method of a class. As private variables I have:

int handler;
    char buffer[512];                
    char comando[512];

int handler;
    char buffer[512];                
    char comando[512];

To copy to clipboard, switch view to plain text mode