#import <Cocoa/Cocoa.h>
 
extern "C"{
    void display(NSString *text);
}
 
@interface Display : NSObject
 
@end
       
#import "Display.h"
 
#include <string>
#include <iostream>
 
using namespace std;
 
void display(NSString *text){
    cout << [text cStringUsingEncoding:NSUTF8StringEncoding] << endl;
}
 
@implementation Display
 
 
@end
       
display(@"Hola");
       
extern "C" void display(NSString *text) {
 
}
       
extern "C" {
    void display(NSString *text) {
 
    }
}
       
#ifdef __cplusplus
    extern "C" {
#endif
void display(NSString *text);
#ifdef __cplusplus
    }
#endif