[Objective-c 基础

#import <Foundation/Foundation.h>

typedef enum {GenderMan, GenderFemale} Gender;

typedef enum {ColorRed, ColorBlue, ColorGreen} Color;

typedef struct
{
    int year;
    int month;
    int day;
} Date;


@interface Dog : NSObject
{
@public
    float weight;
    Color color;
}
- (void) eat;
- (void) run;

@end


@interface Student : NSObject
{
    @public
    char *name;
    Gender gender;
    Date birthday;
    double weight;
    Color favariteColor;
    Dog *dog;
}

- (void) eat;
- (void) run;
- (void) walkDog;
- (void) feedDog;
- (void) print;

@end

@implementation Student
- (void) eat
{
    weight++;
    NSLog(@"吃吃吃，体重增加了1KG， 现在体重是%f", weight);
}

- (void) run
{
    weight--;
    NSLog(@"跑跑跑,体重减去了1KG，现在体重是%f", weight);
}

- (void) print
{
    NSLog(@"这个学生的资料-》姓名:%s, 性别:%d, 生日:%d-%d-%d, 体重:%f, 喜爱的颜色:%d", name, gender, birthday.year, birthday.month, birthday.day, weight, favariteColor);
}

- (void) walkDog
{
    [dog run];
}

- (void) feedDog
{
    [dog eat];
}
@end


@implementation Dog
- (void) eat
{
    NSLog(@"喂狗啦!!!");
    weight++;
    NSLog(@"狗狗吃吃吃，体重增加了1KG， 现在体重是%f", weight);
}

- (void) run
{
    NSLog(@"遛狗啦!!!!");
    weight--;
    NSLog(@"狗狗跑跑跑,体重减去了1KG，现在体重是%f", weight);
}
@end

int main()
{
    Student *stu = [Student new];
    stu->name = "Jack";
    stu->gender = GenderMan;
    Date d = {1989, 8, 10};
    stu->birthday = d;
    stu->weight = 50;
    stu->favariteColor = ColorRed;
   
    Dog *dog = [Dog new];
    stu->dog = dog;
   
    [stu eat];
    [stu feedDog];
    [stu print];
    [stu walkDog];
    [stu feedDog];
   
    return 0;
}