Hello World in Objective C

Hello.h

// Hello.h
#import <Foundation/Foundation.h>

@interface Hello: NSObject {
	
}	

- (void) sayhello ;

@end

Hello.m

// Hello.m

#import "Hello.h"
#import <Foundation/Foundation.h>

@implementation Hello 

- (void) sayhello {
	printf("Hello World\n");
}

@end

HelloMain.m

// HelloMain.m

#import <Foundation/Foundation.h>
#import "Hello.h"

int main(void){
	Hello *helloobj = [[Hello alloc] init];
	[helloobj sayhello];
}