objective-c 基础语法和习题 / 类 详解

1.＃import <Foundation/Foundation.h>
2.@interface Animal: NSObject
3.-(void) run_speed;
4.-(void) set_speed:(int) n;
5.@end
6.@implementation Animal
7.{
8.  int speed;
9.}
10.-(void) run_speed
11.{
12. NSLog(@"run speed %i",speed);
13.}
14.-(void) set_speed:(int) n
15.{
16. speed = n;
17.}
18.@end

1.#import "animal.h"
2.
3.int main (int argc, char * argv[])
4.{
5.    @autoreleasepool{
6.      Animal * dog;
7.
8.        dog = [Animal alloc];
9.        dog = [dog init];
10.
11.        [dog set_speed: 64];
12.        [dog run_speed];
13.
14.    }
15.     return 0;
16.}