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標題: 設計模式----簡單工廠模式----C實例 [打印本頁]

作者: liuda 時間: 2015-1-23 18:55
標題: 設計模式----簡單工廠模式----C實例
#include "stdlib.h"

//父類
typedef struct _milk milk;
typedef int (*creat_milk_tea)(milk *milk);
struct _milk
{
char *milk_tea_type;
int (* creat_milk_tea)(struct _milk *milk);
};

//產品類-----pearl-milk-tea
struct pearl_milk
{
struct _milk milk;
int (*delete_pearl_milk)(struct pearl_milk *pearl_milk);
int (*creat_pearl_milk)(struct pearl_milk *pearl_milk);
};

int delete_milk_pearl(struct pearl_milk *pearl_milk)
{
free(pearl_milk);
return 0;
}

int creat_milk_pearl_tea(struct pearl_milk *pearl_milk)
{
printf("Hi, preal milk is ready!\n");
return 0;
}

struct pearl_milk *creat_pearl_milk(void)
{
struct pearl_milk *pearl_milk = NULL;

pearl_milk = malloc(sizeof(struct pearl_milk));
if(NULL == pearl_milk)return NULL;

pearl_milk->delete_pearl_milk = delete_milk_pearl;
pearl_milk->creat_pearl_milk = creat_milk_pearl_tea;
pearl_milk->milk.creat_milk_tea = (creat_milk_tea)pearl_milk->creat_pearl_milk;

return pearl_milk;
}

//工廠類
struct factory
{
int (*delete_factory)(struct factory *fac);
struct factory *(*creat_factory)(char *milk_tea_type);
};

int delete_milk_factory(struct factory *fac)
{
free(fac);

return 0;
}

milk *creat_milk_factory(char *type)
{
milk *milk = NULL;

if(0 == strcmp("pearl", type))
{
milk = creat_pearl_milk();
}
else
{
printf("Sorry! no %s milk tea\n", type);
}

return milk;
}

struct factory *creak_factory(void)
{
struct factory *fac = malloc(sizeof(struct factory));

if(NULL == fac)return NULL;
fac->delete_factory = delete_milk_factory;
fac->creat_factory = creat_milk_factory;

return fac;
}

int main(int agrc, char *argv[])
{
struct factory *fac = NULL;
milk *sale_milk = NULL;

fac = creak_factory();
if(NULL == fac)return 1;

sale_milk = fac->creat_factory(argv[1]);
if(NULL == sale_milk)return 1;

sale_milk->creat_milk_tea(sale_milk);

fac->delete_factory(fac);
free(sale_milk);

return 0;
}

作者: liuda 時間: 2015-1-23 18:55
近期會有一系列的關于設計模式的筆記出來.

http://dong.hongjun888.blog.163. ... 084200892672212217/很好的解釋了簡單工廠模式.簡單來講一個工廠類就是根據傳入的參量使用相應的產品類，這里面的產品類是實現產品的實例，也可以理解為算法。

http://blog.csdn.net/sx_wpc/article/details/7645062用C實現了簡單工廠模式.

總之,簡單工廠模式一般可由三部分組成:

1. 工廠類: 核心, 會依據客戶端的需求來調用產品類來創建產品

2. 抽象類: 擔任父類的角色, 也就說工廠所有的產品都有的屬性

3. 產品類: 工廠各個產品的實例

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