iOS Development Zoo Management inheritance polymorphism implementation

////main.m//inherit////#import <Foundation/Foundation.h> #import "Animal.h" #import "Cat.h" #import "Dog.h" #import "FeedMan.h" int main (int argc, const char * argv[]) {//Animal * Animal = [Animal new];        [Animal eat];////[Animal sleep];        Forgot to introduce header file//Animal * Cat =[[cat alloc]init];////[cat eat]; Cat * cat = [[Cat alloc]init];////[Cat catchmouse];////dog * dog = [[] Dog alloc]init];////[Do    G bark];////Parent class pointer holds the subclass object, how can I invoke the method of the child class object? Animal * Animal_cat = [[Cat alloc]init];////Feedman * man = [[Feedman alloc]init];//]/[Man showname:        ANIMAL_CAT];    [Animal_cat eat];        [Animal_cat setname:@ "Hello Cat"];        Animal * Animal_dog = [[Dog alloc]init];        Feedman * man = [[Feedman alloc]init];        [Man Showname:animal_dog];        [Man Feedanimal:animal_dog];            Subclass calls the parent class method, how to implement the different nature of the method? return 0;} 

  feedman.h//  Inheritance//#import "Animal.h" @interface feedman:nsobject-(void) ShowName: (Animal *) animal;-(void ) Feedanimal: (Animal *) Animal; @end

  feedman.m//  inherit #import "FeedMan.h" #import "Dog.h" #import "Cat.h" @implementation feedman-(void) Feedanimal: (Animal *) animal{    if ([Animal Iskindofclass:[dog class]]) {                dog * dog = (dog *) Animal;        [Dog eat];    }} -(void) ShowName: (Animal *) animal{    //can dynamically detect the type of animal used to a class?    if ([Animal Iskindofclass:[dog class]])    {        //need to force type conversion        Dog * dog = (dog *) animal;        [Dog bark];    }    else if ([Animal Iskindofclass:[cat class]])    {        Cat * cat = (CAT *) animal;        [Cat Catchmouse];    }    } @end

  animal.h//  inherit #import <Foundation/Foundation.h> @interface animal:nsobject{    nsstring * _name;        int _age;} @property NSString * name; @property int age;-(void) eat;-(void) sleep;-(void) showage; @end

  animal.m//  inherit//#import "Animal.h" @implementation animal-(void) eat{    NSLog (@ "Animal Eats");} -(void) sleep{    NSLog (@ "The animal Sleeps"); -(void) showage{    NSLog (@ "Age of small animals"); @end

  dog.h//  inherit//#import "Animal.h" @interface dog:animal{    }-(void) bark;-(void) eat; @end

  dog.m//  Inheritance//#import "Dog.h" @implementation dog-(void) bark{    NSLog (@ "Puppy barking");} -(void) eat{    NSLog (@ "Puppy Eats");} @end

  cat.h//  inherit #import "Animal.h" @interface cat:animal{    }-(void) catchmouse;-(void) eat; @end

  cat.m//  Inheritance//#import "Cat.h" @implementation cat{    }-(void) catchmouse{    NSLog (@ "Cats catch mice!" ");} -(void) eat{    NSLog (@ "Kitten eats small fish"); @end

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iOS Development Zoo Management inheritance polymorphism implementation