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C# Program for Matrix addition

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Addition of two matrices

C# program to add two matrices has been shown here. Two matrices $[A]_{m \times n}$ and $[B]_{p \times q}$ are considered for addition if the number of rows and columns are same in both of the matrices i.e. $m = p$ and $n = q$.

Algorithm, pseudocode and time complexity of the program have also been shown.






1. C# Program for matrix addition

Code has been copied
/* *******************************************
           alphabetacoder.com
    C# program for matrix addition
******************************************* */

using System;

namespace MatrixAddition
{
    class Program
    {
        static void Main(string[] args)
        {
            //declare and initialize variable
            int m, n, p, q, i, j;
            int[, ] A = new int[10, 10];
            int[, ] B = new int[10, 10];

            //take input of the order of first matrix
            Console.WriteLine("Enter the number of row and column of first matrix=");
            m = Convert.ToInt32(Console.ReadLine());
            n = Convert.ToInt32(Console.ReadLine());

            //take input of the first matrix
            Console.WriteLine("Enter the elements of first matrix of order " + m + " x " + n +" = ");
            for (i = 0; i < m; i++)
            {
                for (j = 0; j < n; j++)
                {
                    A[i, j] = Convert.ToInt32(Console.ReadLine());
                }
            }
            
            //show the first matrix
            Console.WriteLine("First input matrix:");
            for (i = 0; i < m; i++)
            {
                for (j = 0; j < n; j++)
                {
                    Console.Write(A[i, j]+" ");
                }
                Console.WriteLine(" ");
            }

            //take input of the order of second matrix
            Console.WriteLine("Enter the number of row and column of second matrix=");
            p = Convert.ToInt32(Console.ReadLine());
            q = Convert.ToInt32(Console.ReadLine());

            //take input of the second matrix
            Console.WriteLine("Enter the elements of second matrix of order " + p + " x " + q + " = ");
            for (i = 0; i < p; i++)
            {
                for (j = 0; j < q; j++)
                {
                    B[i, j] = Convert.ToInt32(Console.ReadLine());
                }
            }
            
            //show the second matrix
            Console.WriteLine("Second input matrix:");
            for (i = 0; i < p; i++)
            {
                for (j = 0; j < q; j++)
                {
                    Console.Write(B[i, j]+" ");
                }
                Console.WriteLine(" ");
            }

            // check if order of matrices are same
            // if not same then addition is not possible
            if (m != p || n != q)
            {
                Console.WriteLine("\nMatrices are of different order, hence addition is not possible");
            }
            else
            {
                //Do addition
                Console.WriteLine("Resultant matrix after addition: ");
                for (i = 0; i < p; i++)
                {
                    for (j = 0; j < q; j++)
                    {
                        Console.Write(A[i, j] + B[i, j]+" ");
                    }
                    Console.WriteLine(" ");
                }
            }

            // wait for user to press any key
            Console.ReadKey();
        }
    }
}

Output

Case 1:

Enter the number of row and column of first matrix=

2

2

Enter the elements of first matrix of order 2 x 2 =

1

2

3

4

First input matrix:

1 2

3 4

Enter the number of row and column of second matrix=

2

2

Enter the elements of second matrix of order 2 x 2 =

2

3

5

1

Second input matrix:

2 3

5 1

Resultant matrix after addition:

3 5

8 5



Case 2:

Enter the number of row and column of first matrix=

2

3

Enter the elements of first matrix of order 2 x 3 =

1

2

3

4

5

6

First input matrix:

1 2 3

4 5 6

Enter the number of row and column of second matrix=

2

2

Enter the elements of second matrix of order 2 x 2 =

2

3

5

1

Second input matrix:

2 3

5 1


Matrices are of different order, hence addition is not possible





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