有人可以解释这段代码的作用吗？

Question

Can anyone please explain what does the this code does? Just confused on the this portion of the code ( this.matrix = new int[rows, cols]; ).

class Matrix
{   
    private int[,] matrix;

    public Matrix(int rows, int cols)
    {
          this.matrix = new  int[rows, cols];
    }           
}

Answer 1

That code assigns a class variable called matrix a new 2d array that has x number of rows and x number of columns..

Of course these aren't mapped to rows and columns as you would see in excel but basically just saying the first array has rows length, and the second column length such as..

row1: col col col

row2: col col col

is a int[2,3] as is

col1: row row row

col2: row row row

This is all done in the constructor of an instance of a Matrix

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