#import<Foundation/Foundation.h>
@interface Gun :NSObject
{
    @public
    NSString *_size;
    int _countnum;
   
}
-(void)shoot;
@end
@implementation Gun

-(void)shoot
{
    if(_countnum==0)
    {
        NSLog(@"没有子弹了,你打个毛线");
    }
    else
    {
        _countnum-=1;
        NSLog(@"子弹剩余的个数是%d",_countnum);
    }
}

@end

@interface Person : NSObject
{
    @public
    NSString *_name;
   
}
-(void)kaiqiang:(Gun *)gun;
@end
@implementation Person

-(void)kaiqiang:(Gun *)gun
{
    [gun shoot];
}


@end
int main()
{
    Gun *ak=[Gun new];
    ak->_size=@"ak47";
    ak->_countnum=3;
   
    Person *per=[Person new];
    [per kaiqiang:ak];
    [per kaiqiang:ak];
    [per kaiqiang:ak];
    [per kaiqiang:ak];
    [per kaiqiang:ak];

}

你们都已经买好苹果电脑啦？