//Programmer: Andrea

//Date: Jan 20

//Project: U9A4 Matrix Addition

/*Description: Letting user enter the value of matrix A and B then compute and output the sum of these two matrixes.*/

​

using System;

​

public class Program

{

    private static void DisplayMatrix(int [,] A){

​

        //r will be used for displaying the rows

        for (int r=0; r< A.GetLength(0);r++){

​

            //c will be used for displaying the columns

            for (int c=0;c<A.GetLength(1);c++){

                Console.Write(A[r,c]+"   ");

            }

            Console.WriteLine();  //will start the next row

        }

​

    }

​

    public static void Main()

    {

        Console.WriteLine("2D Array Demo");

        //create a 3*3 2D array - matrixA

        int[,] matrixA = new int[3,3];

​

        Console.WriteLine("Please enter the number for matrix A");

​

        for (int r=0; r< matrixA.GetLength(0);r++){ //r will be used for displaying the rows

            for (int c=0;c<matrixA.GetLength(1);c++){ //c will be used for displaying the columns

                Console.WriteLine("MatricA["+r+","+c+"]: ");

                matrixA[r,c] = Convert.ToInt32(Console.ReadLine()); //retrieve matrixB's value

            }

        }

​

        //create a 3*3 2D array - matrixB

        int[,] matrixB = new int[3,3];

​

        Console.WriteLine("Please enter the number for matrix B");

        for (int r=0; r< matrixB.GetLength(0);r++){ //r will be used for displaying the rows

            for (int c=0;c<matrixB.GetLength(1);c++){ //c will be used for displaying the columns

                Console.WriteLine("MatricB["+r+","+c+"]: ");

                matrixB[r,c] = Convert.ToInt32(Console.ReadLine()); //retrieve matrixB's value

            }

        }

​

        //create a 3*3 2D array - matrixSum

        int[,] matrixSum = new int[3,3];

​

        for(int i=0; i<matrixSum.GetLength(0);i++){ //i will be used for displaying the rows

            for(int a=0; a<matrixSum.GetLength(1);a++){ //a will be used for displaying the columns

                matrixSum[i,a]=matrixA[i,a]+matrixB[i,a]; //computes the sum of matrixA and matrixB

            }

        }

​

        Console.WriteLine("\nThe sum of the 2 3*3 matrixes is : ");

        DisplayMatrix(matrixSum);  //displays values of the sum the 2 matrixes

    }

}