total n00b question

[Mykel2727]

so i am just trying to learn obj-c
i have this book: [ame="http://www.amazon.com/Programming-Objective-C-Developers-Library-Stephen/dp/0672325861/ref=pd_bbs_sr_2?ie=UTF8&s=books&qid=1224921644&sr= 8-2"]Programming in Objective-C (Developer's Library)[/ame]
so i just wanna make my first hello world app
but this (old) book still refers to project builder, the old xcode
my code for the app looks like this:

//
//  main.m
//  prog2
//
//  Created by Mykel2727 on 10/24/08.
//  Copyright __MyCompanyName__ 2008. All rights reserved.
//

#import <stdio.h>

int main(int argc, char *argv[])
{
    printf ("Hello World!!!n");
	
	return 0;
}

thats in the main.m file
and i selected cocoa application as my choice at the beginning

i know my code is fine,
its just that xcode doesn't like this
i hit build and go and nothing happens
what do i do

thnks

[NetMage]

Are you familiar with any GUI development at all?

That program would be run from a command line and would only work from a shell prompt on a jailbroken iPhone. It is basically a C program, not Objective-C.

Look for the jailbreak Hello World sample to get a vague idea - I believe the main.m has changed in 2.x:

A Simpler "Hello World" for the iPhone - O'Reilly Mac DevCenter Blog

[Mykel2727]

k nvm i got it
i was just tired and wasnt thinking straight