一 概述
- 本文通过一个实例来讲解如何设计类更加合理有效
- 类：人：成员变量：性别，生日，体重，最喜欢的颜色，狗，方法：吃，跑步，遛狗，喂狗
- 类：狗：成员变量：体重，毛色；方法：吃，跑
二 代码实现
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#include <Foundation/Foundation.h>
typedef enum{
SexMan,
SexWoman
}Sex;
typedef struct {
int year;
int month;
int day;
} Date;
typedef enum {
ColorBlack,
ColorRed,
ColorGreen
}Color;
//---------------狗定义------------
@interface Dog : NSObject
{
@public
double weight;//体重
Color curColor;//毛色
}
-(void)eat;
-(void)run;
@end
@implementation Dog
-(void)eat
{
weight+=1;
NSLog(@"狗吃完这次后的体重是%f",weight);
}
-(void)run
{
weight-=1;
NSLog(@"狗跑完这次后的体重是%f",weight);
}
@end
//---------------人定义------------
@interface Student : NSObject
{
@public
Sex sex;//性别
Date birthday;//生日
double weight;//体重
Color favColor;//最喜欢的颜色
NSString *name;
Dog *dog;
}
-(void)eat;
-(void)run;
-(void)print;
-(void)liuDog;
-(void)weiDog;
@end
@implementation Student
-(void)eat
{
weight+=1;
NSLog(@"吃完这次后的体重是%f",weight);
}
-(void)run
{
weight-=1;
NSLog(@"跑完这次后的体重是%f",weight);
}
-(void)print
{
NSLog(@"性别=%d,喜欢的颜色=%d，姓名=%@,生日=%d-%d-%d",sex,favColor,name,birthday.year,birthday.month,birthday.day);
}
-(void)liuDog
{
[dog run];
}
-(void)weiDog
{
[dog eat];
}
@end
int main()
{
Student *s=[Student new];
Dog *d=[Dog new];
d->curColor=ColorGreen;
d->weight=20;
s->dog=d;
[s liuDog];
[s weiDog];
return 0;
}
void test()
{
Student *s=[Student new];
s->weight=50;
s->sex=SexMan;
s->name=@"jack";
//Date d={2020,3,30};
//s->birthday=d;
//s->birthday.year=2020;
//s->birthday.month=3;
//s->birthday.day=30;
Date d=s->birthday;
d.year=2020;
d.month=3;
d.day=30;
s->birthday=d;
s->favColor=ColorBlack;
[s eat];
[s eat];
[s run];
[s run];
[s print];
}
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三 代码设计说明
- 可以将性别设计成枚举类
- 可以将生日设计成结构体
