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State Pattern카테고리 없음 2013. 3. 10. 06:29반응형
#include <iostream>
#include <string>
using namespace std;
class GameLevel {
public :
static GameLevel* CreateInstance() { return 0; }
virtual void SimpleAttack() = 0;
virtual void TurnAttack() = 0;
virtual void FlyingAttack() = 0;
protected :
GameLevel() {}
};
class GameLevel0 : public GameLevel {
public :
static GameLevel* CreateInstance() {
if (pInstance_ == 0) pInstance_ = new GameLevel0;
return pInstance_;
}
void SimpleAttack() { cout << "Simple Attack" << endl; }
void TurnAttack() { cout << "Not Allowed" << endl; }
void FlyingAttack() { cout << "Not Allowed" << endl; }
protected :
GameLevel0() { }
private :
static GameLevel0 *pInstance_;
};
GameLevel0* GameLevel0::pInstance_ = 0;
class GameLevel1 : public GameLevel {
public :
static GameLevel* CreateInstance() {
if (pInstance_ == 0) pInstance_ = new GameLevel1;
return pInstance_;
}
void SimpleAttack() { cout << "Simple Attack" << endl; }
void TurnAttack() { cout << "Turn Attack" << endl; }
void FlyingAttack() { cout << "Not Allowed" << endl; }
protected :
GameLevel1() { }
private :
static GameLevel1 *pInstance_;
};
GameLevel1* GameLevel1::pInstance_ = 0;
class GameLevel2 : public GameLevel {
public :
static GameLevel* CreateInstance() {
if (pInstance_ == 0) pInstance_ = new GameLevel2;
return pInstance_;
}
void SimpleAttack() { cout << "Simple Attack" << endl; }
void TurnAttack() { cout << "Turn Attack" << endl; }
void FlyingAttack() { cout << "Flying Attack" << endl; }
protected :
GameLevel2() { }
private :
static GameLevel2 *pInstance_;
};
GameLevel2* GameLevel2::pInstance_ = 0;
class GamePlayer {
public :
GamePlayer() { pGameLevel_ = GameLevel0::CreateInstance(); }
void UpgradeLevel(GameLevel* pLevel) {
pGameLevel_ = pLevel;
}
void SimpleAttack() { pGameLevel_->SimpleAttack(); }
void TurnAttack() { pGameLevel_->TurnAttack(); }
void FlyingAttack() { pGameLevel_->FlyingAttack(); }
private :
GameLevel *pGameLevel_;
};
void
main()
{
GamePlayer user1;
user1.SimpleAttack();
user1.TurnAttack();
user1.FlyingAttack();
cout << "--------------------------" << endl;
GameLevel *pGameLevel1 = GameLevel1::CreateInstance();
user1.UpgradeLevel(pGameLevel1);
user1.SimpleAttack();
user1.TurnAttack();
user1.FlyingAttack();
cout << "--------------------------" << endl;
GameLevel *pGameLevel2 = GameLevel2::CreateInstance();
user1.UpgradeLevel(pGameLevel2);
user1.SimpleAttack();
user1.TurnAttack();
user1.FlyingAttack();
}
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