设计模式DP-原型模式

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

// 定义抽象接口
typedef struct interface_t
{
	struct interface_t *(*clone)(void *obj);
	void (*set)(void* obj, const char* name, int age);
	void (*show)(void* obj);
	char name[32]; 
    int age;
}Interface_t;

typedef struct student_t
{
	struct interface_t *(*clone)(void *obj);
	void (*set)(void* obj, const char* str, int age);
	void (*show)(void* obj);
	char name[32];
	int age;
}Student_t;

static void student_set(void* obj, const char* str, int age)
{
	if(!obj || !str)
		return ;
	Student_t *s = (Student_t *)obj;
	strcpy(s->name, str);
	s->age = age;
}

static void student_show(void* obj)
{
	Student_t *s = (Student_t *)obj;
	printf("显示 学生信息: 姓名[%s] 年龄[%d]\n", s->name, s->age);
}

static struct interface_t* student_clone(void *obj)
{
	if(!obj) 
		return NULL;
		
	Interface_t *iobj = (Interface_t *)malloc(sizeof(Interface_t));
	Student_t* s = (Student_t*)obj;
	iobj->show = student_show;
	iobj->set = student_set;
	iobj->clone = student_clone;
	strcpy(iobj->name, s->name);
	iobj->age = s->age;
	printf("调用clone()函数, clone Student\n");
	return iobj;
}

Student_t* constructor_student(void)
{
	Student_t* s = (Student_t*)malloc(sizeof(Student_t));
	s->clone = student_clone;
	s->set = student_set;
	s->show = student_show;
	return s;
}

int main(int argc, char *argv[])
{
	printf("原始的学生信息: \n");
	Student_t *s1 = constructor_student();
	s1->set(s1, "SS", 23);
	s1->show(s1);
	printf("\n");

	Interface_t* i1 = s1->clone(s1);
    free(s1);

	printf("调用clone(),拷贝后的信息: \n");
	i1->show(i1);
	printf("\n");

	printf("重新修改信息: ");
	i1->set(i1, "DD", 41);
	i1->show(i1);
	free(i1);
	return 0;
}

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• ()[https://zhuanlan.zhihu.com/p/627417744]