GPS altitude print to LCD - gps

Question

I am trying to get my arduino uno to display the altitude from a GPS module, without any other data. I am still learning the code, but I've run into a problem where I can't seem to find what command is used to pull the altitude from the GPS string. I know it is pulling the data successfully, as I ran the example code from http://learn.parallax.com/kickstart/28500 and it read the first bit of the string, though I moved onto trying to get the altitude before getting it to scroll the whole string.
I am using a basic 16x2 LCD display, and the display I have working fine.
The end goal of this project is a GPS/gyroscope altimeter that can record to an SD card and record temperature, and deploy a parachute at apogee (15,000ft) and a larger parachute at 1,000ft.
Here is the code I am using for the altitude, I've marked the section I can't figure out. (probably just missing a term, or I might have really messed something up)
Any help would be appreciated, have a great day.
#include <SoftwareSerial.h>
#include "./TinyGPS.h" // Special version for 1.0
#include <LiquidCrystal.h>
TinyGPS gps;
SoftwareSerial nss(0, 255); // Yellow wire to pin 6
LiquidCrystal lcd(7, 8, 9, 10, 11, 12);
void gpsdump(TinyGPS &gps);
bool feedgps();
void setup() {
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
// initialize the serial communications:
Serial.begin(9600);
Serial.begin(115200);
nss.begin(4800);
lcd.print("Reading GPS");
lcd.write(254); // move cursor to beginning of first line
lcd.write(128);
lcd.write(" "); // clear display
lcd.write(" ");
}
void loop() {
bool newdata = false;
unsigned long start = millis();
while (millis() - start < 5000) { // Update every 5 seconds
if (feedgps())
newdata = true;
}
gpsdump(gps);
}
// Get and process GPS data
void gpsdump(TinyGPS &gps) {
// problem area
float falt, flat, flon;
unsigned long age;
gps.f_get_position(&flat, &flon);
inline long altitude (return _altitude);
long _altitude
;lcd.print(_altitude, 4);
}//end problem area
// Feed data as it becomes available
bool feedgps() {
while (nss.available()) {
if (gps.encode(nss.read()))
return true;
}
return false;
}

Answer 1

lcd.print(x,4) prints base-4. Did you want that, or do you want ordinary base-10 (decimal)?
Secondly, where do you expect _altitude to come from? It's uninitialized. There's also an uninitialized falt, and a weird inline long altitude line which doesn't mean anything.
You might be better of learning C++ first, in a desktop environment. Debugging an embedded device is a lot harder, and you're still producing quite a few bugs.