queen类定义如下：class Queen{
   public:
       Queen(int, Queen*);
        bool findSolution();
        bool advance();
        void print();
   private:
        int row;
        const int column;
        Queen* neighbor;
        bool canAttack(int, int); 
   };

Queen::Queen(int col, Queen* ngh):   
                       column(col),neighbor(ngh){
    row=1;    
  }
bool Queen::canAttack(int testRow, int testColumn)   {
    if(row == testRow)
       return true;
    int columnDifference = testColumn-column;
    if((row + columnDifference == testRow) ||
       (row - columnDifference == testRow))
       return true;
    return neighbor && neighbor->canAttack(testRow, testColumn); 
  }
bool Queen::findSolution()  {
    while(neighbor && neighbor->canAttack(row,column))
       if(!advance()) 
     return false;
    return true;   }
bool Queen::advance()   {
    if(row<8){
       row++;
       return findSolution();    
     }
    if(neighbor&&!neighbor->advance())
       return false;
    row=1;
    return findSolution(); 
 }

问：如何定义print函数输出所有结果（可在上述基础上对已定义函数进行适当修改），求高人指导。急！！！！