using correct path in open function

[mike_cana]

Hi everyon, I need to open a file, and if it doesn't exist, make a new one wieth a long value as its name. I found that I can use the Open() function, but I'm having problems with using the correct path.
I want to put the new file or access it from DIR_BANK, and add the SUF_BANK extension to it; both of which are declared in a helper file.
Here is a part of my code, when I try to execute my program, I get the following error: "No such file or directory"
Can you please help me out?
I have commented out all the different paths I tried!
Thanks in advance,
Mike

int openOrCreateAcct (int * const acctFd, const unsigned long acctNum)
{  
  int fd;
  // const char *path = '"%s%u%s", DIR_BANK, acctNum, SUF_BANK';
  //const char *path = "bankPro/acctNum.cct";
  //const char *path = "DIR_BANK/acctNum.SUF_BANK"; //want this!

  if (*acctFd = (fd = open(path, "O_CREAT", "r+")) < 0)
  {
      *acctFd = -1;
      perror("Open failed");
      exit(2);
   }
 .
 .
 .

[joe_bruin]

Originally posted by mike_cana

  if (*acctFd = (fd = open(path, "O_CREAT", "r+")) < 0)

your second and third arguments to open(2) are garbage. O_CREAT is a defined value, not a string literal. include the following headers if you haven't done so already, and it will be defined for you.

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

the 3 argument version of open takes a numerical value which defines the mode bits of the file you want created. there are convenient defines for this one as well.

open(path, O_CREAT, S_IRUSR | S_IWUSR);

try "man 2 open" for more details.

[mike_cana]

thanks
I'm still noob programmer ( I find Java to be so much easier )

ok, now how do I set the path to "DIR_BANK/acctNum.SUF_BANK"
where DIR_BANK and SUF_BANK are defined in a helper file, and acctNum is passed in as a parameter?