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

struct date
{
    unsigned day;
    struct date *(*func[2])(struct date*);
};

struct date *create_date(void)
{
    struct date *obj = malloc(sizeof(struct date));
    return obj ? obj : NULL;
}

struct date *assign(struct date *this, unsigned value){
    this->day = value;
    return this;
}
struct date* print(struct date *this){
    printf("%dn",this->day);
    return this;
}

int main()
{
    struct date *my = create_date();
    assign(my,13);

    my->func[0] = print;
    my->func[1] = print;

    my->func[0](my)->func[1](my);


    //print(my);
    free(my);

}