一位女程序员的奋斗路程

1.@interface Animal: NSObject
2.
3.@property int speed;
4.
5.-(void) run_speed;
6.-(void) set_speed:(int) n;
7.
8.@end
9.
10.@implementation Animal
11.
12.@synthesize speed;
13.
14.-(void) run_speed
15.{
16. NSLog(@"run speed %i",speed);
17.}
18.-(void) set_speed:(int) n
19.{
20. speed = n;
21.}
22.@end

1.
2.        [dog setSpeed: 30];
3.        [dog run_speed];