| 249 | (249p [소스14-1]) 소스 버그
==>
원래 최상위의 EnemyImage 클래스는 static 데이터 멤버를 가지면 안 되고, 각각의 서브 클래스들이 static 데이터 멤버를 가지는 형태여야 맞습니다.(예제 소스를 수정하여 올려 놓았으니 다시 받아서 확인하시기 바랍니다.)
---------- 수정 소스 -------------------------------
/* --- flyweight.C --- */
#include <iostream>
using namespace std;
class EnemyImage {
public :
virtual void Display(int x, int y)=0;
protected :
EnemyImage() {}
EnemyImage(const EnemyImage& rhs);
// static EnemyImage * pInstance_;
};
//-- EnemyImage* EnemyImage::pInstance_ = 0;
class EnemyNoActionImage : public EnemyImage {
public :
static EnemyImage * CreateInstance() {
if (pInstance_ == 0) {
pInstance_ = new EnemyNoActionImage;
cout << "EnemyNoActionImage" << endl;
}
return pInstance_;
}
void Display(int x, int y) {
// -- x,y 위치에 비트맵 이미지 표시
}
protected :
EnemyNoActionImage() { }
EnemyNoActionImage(const EnemyNoActionImage& rhs);
static EnemyImage * pInstance_;
};
EnemyImage* EnemyNoActionImage::pInstance_ = 0;
class EnemyMoveImage : public EnemyImage {
public :
static EnemyImage * CreateInstance() {
if (pInstance_ == 0) {
pInstance_ = new EnemyMoveImage;
cout << "EnemyMoveActionImage" << endl;
}
return pInstance_;
}
void Display(int x, int y) {
// -- x,y 위치에 비트맵 이미지 표시
}
protected :
EnemyMoveImage() { }
EnemyMoveImage(const EnemyMoveImage& rhs);
static EnemyImage * pInstance_;
};
EnemyImage* EnemyMoveImage::pInstance_ = 0;
class EnemyAttackImage : public EnemyImage {
public :
static EnemyImage * CreateInstance() {
if (pInstance_ == 0) {
pInstance_ = new EnemyAttackImage;
cout << "EnemyAttackActionImage" << endl;
}
return pInstance_;
}
void Display(int x, int y) {
// -- x,y 위치에 비트맵 이미지 표시
}
protected :
EnemyAttackImage() { }
EnemyAttackImage(const EnemyAttackImage& rhs);
static EnemyImage * pInstance_;
};
EnemyImage* EnemyAttackImage::pInstance_ = 0;
class EnemyDieImage : public EnemyImage {
public :
static EnemyImage * CreateInstance() {
if (pInstance_ == 0) {
pInstance_ = new EnemyDieImage;
cout << "EnemyDieActionImage" << endl;
}
return pInstance_;
}
void Display(int x, int y) {
// -- x,y 위치에 비트맵 이미지 표시
}
protected :
EnemyDieImage() { }
EnemyDieImage(const EnemyDieImage& rhs);
static EnemyImage * pInstance_;
};
EnemyImage* EnemyDieImage::pInstance_ = 0;
class Enemy {
public :
Enemy(int x, int y) {
curX_ = x; curY_ = y;
pCurImage_ = EnemyNoActionImage::CreateInstance();
}
void Move(int x, int y) {
curX_ = x; curY_ = y;
pCurImage_ = EnemyMoveImage::CreateInstance();
}
void Attack() {
pCurImage_ = EnemyAttackImage::CreateInstance();
}
void Display() {
pCurImage_->Display(curX_, curY_);
}
private :
int curX_, curY_;
EnemyImage * pCurImage_;
};
int
main()
{
Enemy e1(10,10), e2(20,20);
e1.Move(30, 30);
e2.Attack();
e2.Move(40, 40);
} | 2006-10-25 | 1 |