贪吃蛇源程序

贪吃蛇源程序(2) #define SCALE   8
#define UP_KEY   0x4800
#define DOWN_KEY  0x5000
#define LEFT_KEY  0x4b00
#define RIGHT_KEY  0x4d00
#define MOVE_UP   1
#define MOVE_LEFT  2
#define MOVE_DOWN  3
#define MOVE_RIGHT  4
#define INVALID_DIRECTION 0
#define QUIT_KEYC  0x1051
#define QUIT_KEY  0x1071
#define SELECT_KEYC  0x1f53
#define SELECT_KEY      0x1f73
#define PAUSE_KEYC      0x1950
#define PAUSE_KEY       0x1970
#define DEFAULT_LEVEL  1
#define HELP_COLOR  WHITE
#define WELCOME_COLOR WHITE
#define DEFAULT_COLOR GREEN
/* define the macro as follows to improve the game in future */
#define FOOD_COLOR  YELLOW
#define SNAKE_HEAD_COLOR RED
#define DEFAULT_SNAKE_COLOR YELLOW

#define EXIT_COLOR   WHITE
#define SCORE_COLOR   YELLOW

/* sturcture for snake body mainly ,and food also */
typedef strUCt food_infor *FOOD_INFOR_PTR;
typedef struct food_infor{
  int posx;   /* position for each piece of snake body */
  int posy;
  int next_move;      /* next move direction */
  int pre_move;       /* previous move direction,seems unuseful */
  int beEaten;        /* xidentifier for snake body or food */
  FOOD_INFOR_PTR next; /* pointer to next piece of snake body */
  FOOD_INFOR_PTR pre;  /* pointer to previous piece of snake body */