将项目插入队列数组，C＃

Question

I need to insert a simple integer to the queue.

For some reason, it always collapsed on null reference. Do I need to init the queue? How to do this?

This my code.

Queue<int>[] OdafimColors = new Queue<int>[10];
OdafimColors[i].Enqueue(-1);

It is very simple, I can't realize why it doesn't work.

Answer 1

You need to initialize each element in your array:

for(int i = 0; i<OdafimColors.Lenght; i++)
      OdafimColors[i] = new Queue<int>();

Your definition doesn't allocate space for Queues. It allocates memory for the array and the elements are null until you initialize them.

Answer 2

I don't think you want it to be an array. That makes it an array of queues.

You probably want:

Queue<int> OdafimColors = new Queue<int>();
OdafimColors.Enqueue(-1);

http://msdn.microsoft.com/en-us/library/7977ey2c(v=vs.110).aspx