Как вам такая демонстрация идеи программиования объектов на Си в стиле Go?Тут поддерживается скрытие приватных полей и композиция методов.
goc.h
#ifndef GOC_H
#define GOC_H#define fn(obj, fn, ...) (obj).fn(&(obj), ##__VA_ARGS__)
#endif
woman.h
#ifndef WOMAN_H
#define WOMAN_H#include "goc.h"
struct woman;
typedef struct w {
struct woman *w;
void (* hug)(struct w *self);
void (* kiss)(struct w *self);
} woman;
woman new_woman(char *);
void free_woman(woman *);
#endif
woman.c
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>#include "woman.h"
struct woman {
char *name;
bool hugged;
bool kissed;
};
void hug(woman *self) {
if (self->w == NULL) {
printf("No woman allocated!\n");
return;
}
printf("You're hugging %s\n", self->w->name);
if (self->w->hugged) {
printf("%s say: It hurts, get off me!\n", self->w->name);
return;
}
if (self->w->kissed) {
printf("%s say: Get off me, butch!\n", self->w->name);
return;
}
self->w->hugged = true;
printf("%s say: you're sweet!\n", self->w->name);
}
void kiss(woman *self) {
if (self->w == NULL) {
printf("No woman allocated!\n");
return;
}
printf("You're kissing %s\n", self->w->name);
if (!self->w->hugged) {
if (self->w->kissed) {
printf("%s is calling the police!\n", self->w->name);
return;
}
self->w->kissed = true;
printf("%s say: How dare you?\n", self->w->name);
return;
}
if (self->w->kissed) {
printf("%s say: Level up, boy!\n", self->w->name);
return;
}
self->w->kissed = true;
printf("%s say: Mwah!\n", self->w->name);
}
woman new_woman(char *name) {
struct woman *w = calloc(1, sizeof(struct woman));
w->name = name;
woman women = {
.w = w,
.hug = hug,
.kiss = kiss
};
return women;
}
void free_woman(woman *w) {
free(w->w);
w->w = NULL;
}
main.c
#include <stdio.h>#include "woman.h"
int main(void)
{
woman woman;
printf("\033[1mThe right workflow:\033[0m\n");
woman = new_woman("Alice");
fn(woman, hug);
fn(woman, kiss);
fn(woman, kiss);
free_woman(&woman);
putchar('\n');
printf("\033[1mThe wrong workflow:\033[0m\n");
woman = new_woman("Miranda");
fn(woman, kiss);
fn(woman, hug);
fn(woman, kiss);
free_woman(&woman);
putchar('\n');
printf("\033[1mThe dreaming workflow:\033[0m\n");
fn(woman, hug);
fn(woman, kiss);
fn(woman, kiss);
return 0;
}
Программа печатает:
The right workflow:
You're hugging Alice
Alice say: you're sweet!
You're kissing Alice
Alice say: Mwah!
You're kissing Alice
Alice say: Level up, boy!The wrong workflow:
You're kissing Miranda
Miranda say: How dare you?
You're hugging Miranda
Miranda say: Get off me, butch!
You're kissing Miranda
Miranda is calling the police!
The dreaming workflow:
No woman allocated!
No woman allocated!
No woman allocated!
Вариант для распечатки
