#include "snake.h" #include struct snake* add_snake(struct snake* snake,int x,int y){ return NULL; } struct snake* remove_snake(struct snake* snake){ return NULL; } void free_snake(struct snake* sn){ } int is_snake(struct snake* snake,int x,int y){ return 0; } int step_state(struct state* st){ int nx = (st->snake->x + st->sx); int ny = (st->snake->y + st->sy); return END_CONTINUE; }