Question

I’m writing a program for homework, but I have stumbled upon a very hard problem for me.
Now, I’m pretty new to C#, so please bear with me. This may be really easy and obvious.
On-topic:
C# doesn’t allow me to perform arithmetical operations on multidimensional array values:

if(map[0,1] - map[0,0] == 10)

This statement doesn’t return a value, but instead throws me an error:

Object reference not set to an instance of an object.

Answer 1

You need to first declare the array. Example:

var map = new int[2,2];

creates a two-dimensional array with four integer elements.