【练习】狗

//  匿名对象

main.h

#import <Foundation/Foundation.h>

#import "Dog.h"

int main(int argc, const char * argv[])

{

Dog *dog = [Dog new];

dog->speed = 30;

[dog run];

[dog new];

[dog new]->speed = 30;

[[dog new] run];

//  每出现一次[dog new]会创建一个对象

return 0;

}

---

Dog.h

#import <Foundation/Foundation.h>

@interface Dog : NSObject

{

@public

int speed;

}

- (void)run;

@end

---

Dog.m

#import <Dog.h>

@implementation Dog

- (void)run

{

NSLog(@"狗跑起来了，速度是%d",speed);

}

@end