oc-exercises for objects and methods

Explanation of Exercises
Thinking & Implementation 1:
Design a "dog" class
1) Properties: color, speed, gender, weight
2) behavior
Eat: Every time you eat, weight gain 0.5kg, output after eating the weight
Bark: Output All properties
Run: Every run, weight loss 0.5kg, output speed and after running the weight
Compare color: Compare color with other dog, if same, two value do subtraction get 0, return No (0 value), not same, do
Subtract not 0 value, return Yes (1)
Compare speed: Compare speed with other dog, return speed difference (own speed-other dog's speed)


#import <Foundation/Foundation.h>
Enumeration that defines the color of a dog
typedef enum{kcolorwhite,kcoloryellow,kcolorhua,kcolorblack}color;
typedef enum{ksexgong,ksexmu,ksexyao}sex;


Definition of #pragma mark Dog class
@interface Dog:nsobject
{
The dog's instance variable
Color _color; The color of the dog nsstring *_color;
float _weight; The weight of the dog
Sex _sex; Gender
int _speed; Speed
}
The behavior of the dog
-(void) Eat: (NSString *) foodname; Weight +0.5
-(void) run; Weight-0.5
-(void) bark; Print all the information
Compare the color of dog hair
-(void) Iscomparecolorwithother: (dog *) Dog;
Compare speed
-(void) Comparespeedwithother: (dog *) Dog;
@end

#pragma the implementation of Mark's dog class
@implementation DOg
-(void) Eat: (NSString *) Foodname {
_weight + = 0.5f;
NSLog (@ "The dog is eating%@, after eating also played a hiccup!", Foodname);
}
-(void) Run {
_weight-= 0.5f;
NSLog (@ "Dog is running mad at speed%d!", _speed);
}
-(void) Bark {
NSLog (@ "Sex:%d, color:%d, speed:%d, current weight:%d", _sex,_color,_speed,_weight);
}
-(void) Iscomparecolorwithother: (dog *) Dog {
if (_color = = Dog->_color)
return YES;
else return NO;
}
-(void) Comparespeedwithother: (dog *) Dog {
Return _speed-dog->_speed;
}

@end

int main () {
@autoreleasepool {
Create two Dogs
Dog *D1 = [dog new];
D1->_speed = 80;
D1->_weight = 20;
D1->_sex = Ksexyao;
D1->_color = Kcolorhua;
[D1 bark];
[D1 eat:@ "a piece of corn stained with baba"];
[D1 eat:@ "a piece of sweet potatoes stained with baba"];
[D1 bark];

Dog *D2 = [dog new];
D2->_speed = 30;
D2->_weight = 50;
D2->_sex = Ksexgong;
D2->_color = Kcolorblack;
[D2 bark];
[D2 eat:@ "a piece of corn stained with baba"];
[D2 eat:@ "a piece of sweet potatoes stained with baba"];
[D2 bark];
1 Same 0 different
Bool Issamecolor = [D1 iscomparecolorwithother:d2];
NSLog (@ "issamecolor=%d", Issamecolor);
Compare the speed difference of a dog
int cha = [D1 comparespeedwithother:d2];
NSLog (@ "Speed difference:%d", cha);
}
return 0;
}

oc-exercises for objects and methods