/**/#include "defs.H"class Window;class GlyphContext;class Font {  public:    Font(char*);};class BTree;/**/class Glyph {public:    virtual ~Glyph();    virtual void Draw(Window*, GlyphContext&);/**/    virtual void SetFont(Font*, GlyphContext&);    virtual Font* GetFont(GlyphContext&);/**/    virtual void First(GlyphContext&);    virtual void Next(GlyphContext&);    virtual bool IsDone(GlyphContext&);    virtual Glyph* Current(GlyphContext&);/**/    virtual void Insert(Glyph*, GlyphContext&);    virtual void Remove(GlyphContext&);protected:    Glyph();};/**/class Character : public Glyph {public:    Character(char);    virtual void Draw(Window*, GlyphContext&);private:    char _charcode;};/**/class GlyphContext {public:    GlyphContext();    virtual ~GlyphContext();/**/    virtual void Next(int step = 1);    virtual void Insert(int quantity = 1);/**/    virtual Font* GetFont();    virtual void SetFont(Font*, int span = 1);private:    int _index;    BTree* _fonts;};/**/void dummy () {/**/GlyphContext gc;Font* times12 = new Font("Times-Roman-12");Font* timesItalic12 = new Font("Times-Italic-12");// ...gc.SetFont(times12, 6);/**/gc.Insert(6);gc.SetFont(timesItalic12, 6);/**/}/**/class Row {};class Column {};/**/const int NCHARCODES = 128;class GlyphFactory {public:    GlyphFactory();    virtual ~GlyphFactory();/**/    virtual Character* CreateCharacter(char);    virtual Row* CreateRow();    virtual Column* CreateColumn();    // ...private:    Character* _character[NCHARCODES];};/**/GlyphFactory::GlyphFactory () {    for (int i = 0; i < NCHARCODES; ++i) {         _character[i] = 0;    }}/**/Character* GlyphFactory::CreateCharacter (char c) {    if (!_character[c]) {        _character[c] = new Character(c);    }    return _character[c];}/**/Row* GlyphFactory::CreateRow () {    return new Row;}/**/Column* GlyphFactory::CreateColumn () {    return new Column;}/**/