CODEWITHSUNDEEP
c#arrays
user3019217
user3019217

Reputation: 335

Create specific multidimensional array

I have an somewhat basic question regarding multidimensional arrays in C#.

Currently I have the following array:

float[] matrix = new float[16];

I need to create instead a 2D array with each line containing the previously mentioned 16 float numbers. Also, the number of lines in the 2D array is not known at the start of the program (i.e. it will be based on a variable).

How can I create such an array using an efficient data structure?

Upvotes: 4

Views: 394

Answers (3)

Grishka
Grishka

Reputation: 49

You can use multidimentional array syntax

float[,] arr2D = new float[12,12];

Alternatively, you could use a loop

float[][] floats = new float[12][];
for(int i=0; i< 12; i++)
{
floats[i] = new float[12];
}

Upvotes: 1

Yuck
Yuck

Reputation: 50835

You could do something like this:

const Int32 arraySize = 16;
var list = new List<float[]>();

Which gives you an empty list containing zero elements (arrays) to start. As you need to add new arrays you would write this:

var array = new float[arraySize];
// do stuff to the array

And then add it to the list:

list.Add(array);

Upvotes: 1

Matthias
Matthias

Reputation: 5764

To store 16 float numbers, you could use a 4x4 matrix (which is a 4x4 2-dimensional array). For more details, check out this documentation.

// init the array
float[,] matrix = new float[4,4];

// loop through the array
for(int col = 0; col < matrix.GetLength(0); col++)
  for(int row = 0; row < matrix.GetLength(1); row++)
     Console.WriteLine(matrix[col, row]);

Upvotes: 1

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