Terminal mode object C Ex1

Ref:http://www.informit.com/articles/article.aspx?p=1819492
Macbook pro (OS X EI Captian 10.11.5)
Xcode 7.3.1
1. Prepare code (main.m)
//
//  main.m
//  prog1
//
//  Created by Steve Kochan on 7/7/11.
//  Copyright 2011 ClassroomM, Inc.. All rights reserved.
//
// clang -fobjc-arc -framework Foundation main.m -o prog1
// ,/prog1
//
#import <Foundation/Foundation.h>

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

      // insert code here...
      NSLog (@"Hello World!");
   }
   return 0;

}
2. Compile

clang -fobjc-arc -framework Foundation main.m ecute-o prog1

3. Execute
./prog1

4. Result