fig12_13.cpp

经典书籍源代码啊。。。第三版。。。数据结构与算法分析——C++描述(第3版).

    void printTree( ) const
    {
        if( header->right == nullNode )
            cout << "Empty tree" << endl;
        else
            printTree( header->right );
    }
    
    void printTree( RedBlackNode *t ) const
    {
        if( t != t->left )
        {
            printTree( t->left );
            cout << t->element << endl;
            printTree( t->right );
        }
    }
    
    const RedBlackTree & operator=( const RedBlackTree & rhs )
    {
        if( this != &rhs )
        {
            makeEmpty( );
            header->right = clone( rhs.header->right );
        }
    
        return *this;
    }
    
    RedBlackNode * clone( RedBlackNode * t ) const
    {
        if( t == t->left )  // Cannot test against nullNode!!!
            return nullNode;
        else
            return new RedBlackNode( t->element, clone( t->left ),
                                     clone( t->right ), t->color );
    }