C 之callback 和 typedef 简单应用

#include
#include
typedef int int_m ;
int test(void);
typedef int (* pFunc)(void);
int main()
{
int_m a;
a =10;
printf("this a test %d \n",a);
printf("***********more*******\n");
pFunc t;
t = test;
t();
return 0;
}
int test(void)
{
        printf("typedef used in callback function...\n");
        return 0;
}

一个简单的例子，做个笔记。

加上回调，呵呵。

#include

#include

struct animal {

char name[24];

void (*cry)(struct animal *);

};

void cat_cry(struct animal * any)

{

printf("%s --%s",any->name,"miaomiao\n");

}

void dog_cry(struct animal * any)

{

printf("%s --%s",any->name,"wangwang\n");

}

int main()

{

//cat

   struct animal cat = {

.name = "cat",

.cry  = cat_cry,

};

struct animal * pcat = &cat;

pcat->cry(pcat);

//dog

struct animal dog = {

.name = "dog",

.cry = dog_cry,

};

struct animal * pdog = &dog;

pdog->cry(pdog);

return 0;

}