1#import <objc/NSObject.h> 2#include <stdio.h> 3 4struct Structure { 5 int m_field; 6 void fun() { 7 puts("check this\n"); 8 } 9}; 10 11@interface Classic : NSObject { 12@public 13 int _ivar; 14} 15@end 16 17@implementation Classic 18- (void)fun { 19 puts("check self\n"); 20} 21@end 22 23int main() { 24 Structure s; 25 s.m_field = 41; 26 s.fun(); 27 28 Classic *c = [Classic new]; 29 c->_ivar = 30; 30 [c fun]; 31 32 Classic *self = c; 33 puts("check explicit self\n"); 34 (void)self; 35} 36