@interface Person : NSObject{    NSString *name;    int age;}- (NSString *)name; //get method- (void)setName:(NSString *)value;- (int) age; //get method;- (void)setAge:(int)age;- (BOOL)canLegallyVote;//another way to creat property//property declarations@property int age;@property (copy) NSString *name;@property (readonly) BOOL canLegallyVote; - (void)castBallot;@end // implementation file@implementation Person;- (int) age {return age;}- (void)setAge:(int) value{    age=value; } - (NSString *) name {return name;}- (void)setName:(NSString *) value{    name=value;} //calling method- (BOOL)canLegallyVote {     return (self age>=18);}//antoher way to write it@synthesize age;@synthesize name;- (BOOL)canLegallyVote{    return(age >18);}   - (void)castBallot {   if([self canLegallyVote]){     //do voting stuff}else {    NSLog(@"I'm not allowed to vote yet!");}}}   @end // Autoreleasing example- (NSString *)fullName{      NSString *result;      result=[[NSString alloc] initWithFormat:"%@ %@" , firstName, lastName];      [result autorelease];       return result;}