[Objective-c 基础 - 1.2] OC的基本类

 #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 = {, , };
     stu->birthday = d;
     stu->weight = ;
     stu->favariteColor = ColorRed;

     Dog *dog = [Dog new];
     stu->dog = dog;

     [stu eat];
     [stu feedDog];
     [stu print];
     [stu walkDog];
     [stu feedDog];

     return ;
 }