贪吃蛇源程序

贪吃蛇源程序(10)    break;

  default:
   break;
 }

 show_level();
}

/* sub function: calulate_hop()        */
/* function: calculate the shortest path from snake head to */
/*           the food it will eaten.      */
void calculate_hop()
{
 hopcount = (snake_head.posx >= current->posx) ? ((snake_head.posx - current->posx) /

SCALE) :
    ((current->posx - snake_head.posx) / SCALE);
 hopcount += (snake_head.posy >= current->posy) ? ((snake_head.posy - current->posy) /

SCALE) :
    ((current->posy - snake_head.posy) / SCALE);

}

/* sub function: release()         

*/
/* function:free memory before exit game or restart   */
void release(SNAKE_HEAD snake_head)
{
 FOOD_INFOR_PTR traceon,last;

    traceon = snake_head.next;
 snake_head.eatenC = 0;
 snake_head.next = NULL;
 snake_head.hop = 0;

 while(traceon)
  if(traceon->next != NULL)
   traceon = traceon->next;
  else
   break;
 while(traceon)
 {
  last = traceon->pre;
  free(traceon);
  traceon = last;
 }

}

/* sub function: show_level()x        */
/* function:show level information to player anytime  */
void show_level()
{
 char str[20];
 int size;
 void *buf;

 settextstyle(DEFAULT_FONT,0,1);
 setcolor(DEFAULT_COLOR);

 sprintf(str,"Level:%d",level);
 size = imagesize(0,border_LT.y,textwidth(str),border_LT.y + textheight(str));