Objective C/Cocoa?

#import <Foundation/Foundation.h>

int main (int argc, const char * argv[]) {

    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    NSArray *args = [[NSProcessInfo processInfo] arguments];

    NSCountedSet *cset = [[NSCountedSet alloc] initWithArray:args];

    NSArray *sorted_args = [[cset allObjects]

        sortedArrayUsingSelector:@selector(compare:)];

    NSEnumerator *enm = [sorted_args objectEnumerator];

    id word;

    while (word = [enm nextObject]) {

        printf("%s\n", [word UTF8String]);

    }

    [cset release];

    [pool release];

    return 0;

}