小编Pro*_*kie的帖子

尝试在C#中添加和删除队列中的节点.但是,当尝试使用时,front.Next我得到一个编译器错误,该定义未包含在内.

class Queue<T>
{
    int count = 0;
    Node<T> front = null;
    Node<T> end = null;

    public void Enqueue(T obj)
    {
        if (count == 0)
        {
            front = new Node<T>(obj);
        }
        else 
        {
            Node<T> newEnd = new Node<T>(obj);
            newEnd.Next = end;
            count++;
            end = newEnd;
        }
    }

    public T Dequeue(T obj)
    {
        Node<T> newFront = new Node<T>(obj);
        newFront = front.Next;
        count--;
        front = newFront;
        return front;
    }
}

我试图检查c#中是否有某种类型的类.它会在表单上打印出某些标签,具体取决于它的类型.这是我到目前为止所做的,它适用于"if"语句.但是,我收到"无法转换类型对象"的错误.在这种情况下是否可以使用if-else语句？

public void ShowStaffData(string pName)
{
  //Gets Staff Details from the name slected int he list box in the form
  people.CreatePeople();
  var currentPerson = 
    people.person.Where(p => p.Forename + " " + p.Surname == pName);

  // How the info is printed out if person selected in 
  // a member of Accademic Staff
  AccademicStaff accademic = currentPerson as AccademicStaff;

  if (currentPerson!=null)
  {
    foreach (AccademicStaff accStaff in currentPerson)
    {
      label9.Text = accStaff.Forename + " " + accStaff.Surname;
      label10.Text = accStaff.IdentificationNumber.ToString();
      label11.Text = accStaff.DateOfBirth; …

我有一个看起来像这样的文本文件

1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 76 77 78 79 …