c语言， objective code(new 1)

c struct, objective code

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typedef int (*PF_EAT) (char* food, const int cnt);
typedef int (*PF_WALK) (char* place, const int miles, int walk_miles);
typedef void (*PF_SAY) (const char* to_who, const char* words);

#define FEMALE 0
#define MALE 1

typedef struct{
    char* name;
    char sex;
    int age;
    PF_EAT eat;
    PF_WALK walk;
    PF_SAY say;
}ST_PERSON;

struct foods{
    char name[];
    int cnt;
};

struct foods food_to_full[] = {
    {"milk", },
    {"rice", },
    {"bread", }
};

int f_eat (char* food, const int cnt)
{

    int index = ;
    int ret = -;//ret = -1, nothing to eat

    if(food == ){
        return -;
    }    

    for(index =  ; index < ; index++){
        if(strcmp(food, food_to_full[index].name) ==  ){
            ret = (cnt >= food_to_full[index].cnt ? : );//ret = 1, not full

            printf("eat %d *%s %s\n", cnt, food, ret ==  ? "is full" : "is not full");

            break;
        }
    }

    return ret;
}

int f_walk(char* place, const int miles, int walk_miles)
{
    int ret = ;
    if(place == ){
        return ;
    }

    ret = (miles - walk_miles > ) ? (miles - walk_miles) : ;

    printf("walk to %s, %s", place, ret >  ? "is on the load" : "has arrived the location" );

    if(ret > )
    {
        printf(", remains %d miles to walk", ret);
    }
    printf("\n");
    return ret;

}

void f_say (const char* to_who, const char* words)
{
    printf("Hi %s, %s\n",to_who, words);
}

void person_one_day(ST_PERSON *person, struct foods* food_have, char *where, int miles, int walk_miles, char* to_who, char* words )
{
    printf("%s, %s, %d years old\n", person->name, (person->sex == MALE) ? "male" : "female", person->age);
    person->eat(food_have->name, food_have->cnt);
    person->walk(where, miles, walk_miles);
    person->say(to_who , words);

    printf("\n");
}

ST_PERSON Ocean = {
    .name = "Ocean",
    .sex = MALE,
    .age = ,
    .eat = f_eat,
    .walk = f_walk,
    .say = f_say,
};

ST_PERSON Li = {
    .name = "Li",
    .sex = FEMALE,
    .age = ,
    .eat = f_eat,
    .walk = f_walk,
    .say = f_say,
};

int main(int argc, char** argv) 
{ 
    struct foods food_have_ocean = {"rice", }; 
    struct foods food_have_li = {"milk", }; 
    person_one_day(&Li, &food_have_li, "town", , , "Lucy", "I am so tired!"); 
    person_one_day(&Ocean, &food_have_ocean, "town", , , "Lucy", "I am waiting for my wife"); 
    return ; 
}

/*

>gcc person.c ; ./a.out

Li, female, 28 years old
eat 1 *milk is not full
walk to town, is on the load, remains 4 miles to walk
Hi Lucy, I am so tired!

Ocean, male, 26 years old
eat 1 *rice is full
walk to town, has arrived the location
Hi Lucy, I am waiting for my wife

*/