OC2-重写

//

//  Dog.h

//  OC2-重写

//

//  Created by qianfeng on 15/6/17.

//  Copyright (c) 2015年 qianfeng. All rights reserved.

//

#import "Animal.h"

@interface Dog : Animal

{

    float _weight;

}

@property (assign,nonatomic)float weight;

@end

//

//  Dog.m

//  OC2-重写

//

//  Created by qianfeng on 15/6/17.

//  Copyright (c) 2015年 qianfeng. All rights reserved.

//

#import "Dog.h"

//重写父类的继承过来的方法,不需要再次声明

@implementation Dog

-(void)printAnimalInformation

{

    NSLog(@"name=%@,age=%i,,weight=%.2f",_name,_age,_weight);

}

-(void)showAnimalFood

{

    NSLog(@"%@_____",[self class]);

}

@end

//

//  Animal.h

//  OC2-重写

//

//  Created by qianfeng on 15/6/17.

//  Copyright (c) 2015年 qianfeng. All rights reserved.

//

#import <Foundation/Foundation.h>

@interface Animal : NSObject

{

    NSString *_name;

    int _age;

}

@property (copy,nonatomic)NSString *name;

@property(assign,nonatomic)int age;

-(void)showAnimalFood;

-(void)printAnimalInformation;

@end

//

//  Animal.m

//  OC2-重写

//

//  Created by qianfeng on 15/6/17.

//  Copyright (c) 2015年 qianfeng. All rights reserved.

//

#import "Animal.h"

@implementation Animal

-(void)showAnimalFood

{

    NSLog(@"%@_____",[self class]);

}

-(void)printAnimalInformation

{

    NSLog(@"name=%@,age=%i",_name,_age);

}

@end

//

//  main.m

//  OC2-重写

//

//  Created by qianfeng on 15/6/17.

//  Copyright (c) 2015年 qianfeng. All rights reserved.

//

#import <Foundation/Foundation.h>

#import "Dog.h"

#import "Animal.h"

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

    @autoreleasepool {

        Dog *xiaobai =[[Dog alloc] init];

        xiaobai.name=@"";

        xiaobai.age=;

        xiaobai.weight=;

        [xiaobai printAnimalInformation];

        [xiaobai showAnimalFood];

        Animal *xiaohei =[[Animal alloc] init];

        xiaohei.name=@"xiaohei";

        xiaohei.age=;

        [xiaohei printAnimalInformation];

        [xiaohei showAnimalFood];

    }

    return ;

}