! C Question: Passing multi dimensional arrays through routines

hello all, i have a c question.

This is in regards to passing a multi dimensional array through to another routine.

i have defined in one routine, a multi 2-dimensional array:


byte sitecode_rules[10][15];


and i am using it as so:


if( check_code_rules( sitecode_rules, scan_delivery, s_count ) )


compiler gives me a suspicious pointer conversion on that line.

the check_code_rules routine looks something like this:


byte check_code_rules( byte *rule[], byte *scan, int number_of_rules )
{
...
}

I am working on an embedded platform and the rule[] array data is somehow getting corrupt within the check_code_rules routine.

I know this because i output the data within the array on the lcd.
The data is ok however, within the higher routine which calls check_code_rules.

I have tried

if( check_code_rules( &sitecode_rules[0], scan_delivery, s_count ) )

and even,

if( check_code_rules( &sitecode_rules[0][0], scan_delivery, s_count ) )

data is still corrupt.

What am I doing wrong?

(calling all c gurus)

to pass 2 dimensional arrays you prototype is as[code]
void func(char **2darray);
or
void func(char *2darry[]);
so something must be wrong with your function

thanks for your reply linuxdude

so you are saying that when i'm using the function, the following should work?


if( check_code_rules( sitecode_rules, scan_delivery, s_count ) )


Because the compiler is complaining about a Suspicious pointer conversion on that line.


if( check_code_rules( &sitecode_rules[0], scan_delivery, s_count ) )

and

if( check_code_rules( &sitecode_rules[0][0], scan_delivery, s_count ) )

gives the same warning from the compiler.

it's only a warning but the data within the array is corrupt somehow, the routine itself does not do anything with the data. I'm only outputting it on the lcd.

post all your code and let us see and also post the exact compiler warning please(to help you of course) and plz use [ code] and [ /code] tags without the spaces

Code:

---

byte sitecode_rules[10][15];
byte *rule[]

---

The first line declares a two dimension array of bytes. The second one declares a one dimensional array of pointers to bytes. Therefore, they are not interchangeable.

If you want to pass a two dimension array to a function, you must provide the size of the second dimension.

Code:

---

byte check_code_rules(byte rule[][15], byte *scan, int number_of_rules )

---

This thread may help you:
http://cboard.cprogramming.com/showthread.php?t=51608

cheers, that fixed it.

ta anonytmous

To clarify, you have to provide the size of all dimensions execpt the first. It is optional:

Code:

---

void foo( int bar[] ); /* fine */
void fOo( char bar[][10] ); /* fine */
void foO( char bar[10][] ); /* not fine */
void Foo( char bar[][3][4] ); /* fine */
void FOo( char bar[3][4][5] ); /* fine */

---

And so on...

Quzah.