#include?
#include?
#include?
#include?
#include?
#include?
#include?
#define??N?22
using?namespace?std;
?
????int?gameover;
?
????int?x1?y1;
?
????int?xy;
?
????long?start;
?
class?snake_position
{
public:
?
????int?xy;?
????snake_position（）{};
?
????void?initialize（int?&）;?
?
};
?
snake_position?position[（N-2）*（N-2）+1];?
void?snake_position::initialize（int?&j）
{
????????x?=?1;
?
????????y?=?j;
}
?
?

class?snake_map
{
?
private:
?
????char?s[N][N];?
????int?grade?length;
?
????int?gamespeed;?
????char?direction;?
????int?headtail;
?
????int?score;
?
????bool?gameauto;
?
public:
?
????snake_map（int?h=4int?t=1int?l=4char?d=77int?s=0）:length（l）direction（d）head