Wednesday, August 8, 2012

matrix multiplication in c#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace matrix_multiplication
{
    class Program
    {
        static void Main(string[] args)
        {
            int i, j;
            int[,] a = new int[2, 2];
            Console.WriteLine("Enter no for 2*2 matrix");
            for (i = 0; i < 2; i++)
            {
                for (j = 0; j < 2; j++)
                {
                    a[i, j] = int.Parse(Console.ReadLine());
                }
            }
            Console.WriteLine("First matrix is:");
            for (i = 0; i < 2; i++)
            {
                for (j = 0; j < 2; j++)
                {
                  Console.Write(a[i,j]+"\t");
                }
                Console.WriteLine();
            }

          
            int[,] b = new int[2, 2];
            Console.WriteLine("Enter no for 2*2 matrix");
            for (i = 0; i < 2; i++)
            {
                for (j = 0; j < 2; j++)
                {
                    b[i, j] = int.Parse(Console.ReadLine());
                }
            }
            Console.WriteLine("second matrix is:");
            for (i = 0; i < 2; i++)
            {
                for (j = 0; j < 2; j++)
                {
                    Console.Write(b[i, j] + "\t");
                }
                Console.WriteLine();
            }

            Console.WriteLine("Matrix multiplication is:");
            int[,] c = new int[2, 2];
            for (i = 0; i < 2; i++)
            {
                for (j = 0; j < 2; j++)
                {
                    
                    
                    c[i,j]=0;
                     for (int k = 0; k < 2; k++)
                     {
                         c[i, j] +=  a[i, k] * b[k, j];
                     }
                 }
            }
            for (i = 0; i < 2; i++)
            {
                for (j = 0; j < 2; j++)
                {
                    Console.Write(c[i, j]+"\t");
                }
                Console.WriteLine();
            }

            Console.ReadKey();
        }
    }
}

output

Enter no for 2*2 matrix
8
7
6
0
First matrix is:
8       7
6       0
Enter no for 2*2 matrix
4
3
2
1
second matrix is:
4       3
2       1
Matrix multiplication is:
46      31
24      18
Posted by at

7 comments:

  1. AravinMarch 28, 2013 at 10:47 AM

    useful blog..!

    ReplyDelete
  2. UnknownSeptember 4, 2013 at 11:55 PM

    Nice easily understanding.....

    ReplyDelete
  3. AnonymousSeptember 13, 2013 at 12:20 AM

    Try to minimize it...........!

    ReplyDelete
  4. AnonymousOctober 8, 2013 at 7:58 PM

    it's easy to understand

    ReplyDelete
  5. suryaJanuary 14, 2014 at 4:39 AM

    It would have been easier if the program was split into functional parts instead of one single function

    ReplyDelete
  6. AnonymousFebruary 3, 2014 at 3:50 AM

    //n numbers matrix multiplication

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;

    namespace OOP_C_Sharp
    {
    class Matrix_mul
    {
    static void Main(string[] args)
    {
    //Matrix Multiplication using user input
    int Arow, row_column,Bcolumn;
    Console.WriteLine("How many Row & column will u take input for matrix multiplication?");
    Console.Write("\nEnter the first matrix Row numbers: ");
    Arow = int.Parse(Console.ReadLine());
    Console.Write("Enter the first matrix Column numbers: ");
    row_column = int.Parse(Console.ReadLine());
    Console.WriteLine("\nEnter the 2nd matrix row numbers: {0}",row_column);
    Console.Write("Enter the 2nd Matrix column numbers: ");
    Bcolumn = int.Parse(Console.ReadLine());

    matrixMul m = new matrixMul();
    int[,] a = new int[Arow, row_column];
    int[,] b = new int[row_column, Bcolumn];
    int[,] res = new int[ Arow,Bcolumn ];

    Console.WriteLine("\nEnter the First Matrix value: ");
    m.matrixInput(a, Arow, row_column);


    Console.WriteLine("\nEnter the 2nd Matrix value: ");
    m.matrixInput(b, row_column, Bcolumn);

    Console.WriteLine("\nFirst Matrix are: ");
    m.matrixDisplay(a, Arow, row_column);

    Console.WriteLine("\n2nd Matrix are: ");
    m.matrixDisplay(b, row_column, Bcolumn);

    Console.WriteLine("\nThe Matrix multiplication (A.B) are: ");
    int i, j;
    for (i = 0; i < Arow; i++)
    {
    for (j = 0; j < Bcolumn; j++)
    {
    res[i, j] = 0;
    for (int k = 0; k < row_column; k++)
    res[i, j] += a[i, k] * b[k, j];
    }
    }
    m.matrixDisplay(res, Arow, Bcolumn);

    Console.ReadKey();
    }
    }
    class matrixMul
    {
    public void matrixInput(int[,] arr,int r,int c)
    {
    int i, j;
    for (i = 0; i < r; i++)
    {
    for (j = 0; j < c; j++)
    arr[i, j] = int.Parse(Console.ReadLine());
    }
    }

    public void matrixDisplay(int[,] arr,int r, int c)
    {
    int i, j;
    for (i = 0; i < r; i++)
    {
    for (j = 0; j < c; j++)
    Console.Write(arr[i,j]+"\t");
    Console.WriteLine();
    }
    }
    }
    }

    ReplyDelete
  7. AnonymousMarch 22, 2014 at 4:15 AM

    why we are using int k and than loop?
    i cant understand ,plz explain me......

    ReplyDelete

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