Updating file name

Hey,
Ive written a program in c/opengl and it creates a .tga file of each frame to make a short animation. However, im wanting to 'update' the file name it creates in the function each time its called.

eg:
call 1: name=1.tga
call 2: name=2.tga
...
call n: name=n.tga

How might I go about doing this?

Code:

---

#include <stdio.h>

int CreateFile(void)
{
  static int counter;
  char buf[BUFSIZ];
 
  counter++;
  sprintf(buf, "%d.tga", counter);
 
  puts(buf);
 
  return 0;
}

int main(void)
{
  int i;
 
  for (i = 0; i < 10; i++)
    CreateFile();
 
  return 0;
}

---

yeh! daddy cool :D it works, ty :)