scanf broken in xcode?

[pcmxa]

Has anyone run into problems with scanf in xcode?  I was working through chapter 5 and doing the GCD example.  The code worked fine.  Now though when I try and run it, nothing happens after entering the numbers.  No other programs with scanf will work either.  if I comment out the scanf line and hard code integer values, the program works fine.  has anyone else run into this?

Code: (Objective-C)

#import <Foundation/Foundation.h>

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

    // insert code here...
	
	//decalre variables
	
	unsigned int u, v, temp;
	
	//ask for two integers
	
	NSLog(@"PLEASE TYPE IN TWO POSITIVE INTEGERS");
	scanf("%u%u", &u, &v);
	
	//algorithm for finding GCD using while
	
	while (v != 0 ){
		temp = u % v;
		NSLog(@"%u modulus %u is %u", u, v, temp);
		u = v;
		v = temp;
	}
	
	NSLog(@"Their greatest common denominator  %u", u);

    [pool drain];
    return 0;
}

[skochan]

Are you pressing Return or Enter at the end of your input line?   See these threads:

http://classroomm.com/objective-c/index.php?topic=544.0
http://classroomm.com/objective-c/index.php?topic=31.0

Cheers,

Steve Kochan

[lafOC]

Those two links are helpful.  I'm using a macbook pro laptop and the enter and return are on the same button, but if you shift while pushing the enter/return button scanf will work.  Unshifted must be the Return and Shifted must be the Enter.

[knportal]

Thank you so much for posting this - i thought i was going crazy.

[karabantos]

it's just not working 

I've been trying but nothing happens