newbie programming question

I'm learning how to program with Objective C 2.0. I don't have any previous experience. I am using the book "Programming in Objective-C 2.0 by Kochan.

I'm not sure why the following program isn't working. The original program in the book doesn't have the getchar() function. But that didn't work. I found out that scanf also reads the "enter" as "endl" so I inserted getchar. But this still doesn't work.

Can someone help me out? Thanks!

// program to reverse the digits of a number 123 -> 321
// from Programming in Objective-C 2.0 by Kochan

#import <Foundation/Foundation.h>

int main (int argc, const char * argv[]) {
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
int number, right_digit;

NSLog (@" Enter number.");
scanf ("%i", &number);
getchar (); //the code in the book did not include this part

//NSLog (@"%i", number);

while ( number != 0)
{ right_digit = number % 10;
NSLog (@"%i", right_digit);
number /= 10;
}

[pool drain];
return 0;
}

People might have a better chance of making suggestions if you were to explain specifically in what way the program isn't working for you.

here are my outputs

Typing in intergers like 153 doesn't do anything. Typing in ( or ) or 0 get's "status 0" message.

[Session started at 2009-04-22 23:12:01 -0400.]
2009-04-22 23:12:01.884 prog5.8[280:10b] Enter number.
153
(

The Debugger has exited with status 0.
[Session started at 2009-04-22 23:12:12 -0400.]
2009-04-22 23:12:12.236 prog5.8[281:10b] Enter number.
0

The Debugger has exited with status 0.