extract call-sign and suffix value

callsign_extract.c

void extract_callsign()
{
  char* callsign_raw = "E2X-1";
  char callsign_format[7];
  char* pch;

  Serial.println(callsign_raw);

 // clear array
  memset(callsign_format, 0, sizeof(callsign_format));

  // split callsign
  pch = strtok(callsign_raw,"-");

  // copy callsign
  strcpy(callsign_format, pch);

  // split suffix
  pch = strtok(NULL, "-");
  if(pch != NULL) //copy suffix to last array
  {
    callsign_format[callsign_format)-1] = pch[0];
  }
  else //no suffix, set last array to zero value
  {
    callsign_format[callsign_format)-1] = '0';
  }

  // Just Display
  for(int i =0; i<callsign_format); i++)
  {
    Serial.print("chr");
    Serial.print(i);
    Serial.print(" ");
    Serial.println(callsign_format[i]);
  }
  
}