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c#multidimensional-arrayoperation

Can't do arithmetical operations on array values in c#

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.

Solution

  • You need to first declare the array. Example:

    var map = new int[2,2];

    creates a two-dimensional array with four integer elements.