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Program to Perform Encoding of a Message Using Matrix Multiplication



Program to Perform Encoding of a Message Using Matrix Multiplication

This is a C++ Program to perform encoding matrix using a hidden-key. Encoding is performed using matrix multiplication between given matrix and key matrix.

    #include<conio.h>

    #include<iostream>

    using namespace std;

    int main()

    {

        int a[10][10], b[10][10], c[10][10];

        int x, y, i, j;


        cout << "\nEnter the number of rows and columns for Message Matrix:\n\n";

        cin >> x >> y;

        // x denotes number rows in matrix A

        // y denotes number columns in matrix A

        cout << "\n\nEnter elements for Matrix :::\n\n";

        for (i = 0; i < x; i++)

        {

            for (j = 0; j < y; j++)

            {

                cin >> a[i][j];

            }

            cout << "\n";

        }

        cout << "\n\nMatrix :\n\n";

        for (i = 0; i < x; i++)

        {

            for (j = 0; j < y; j++)

            {

                cout << "\t" << a[i][j];

            }

            cout << "\n\n";

        }

        for (i = 0; i < y; i++)

        {

            for (j = 0; j < x; j++)

            {

                b[i][j]=x+y;

            }

            cout << "\n";

        }

            for (i = 0; i < x; i++)

            {

                for (j = 0; j < x; j++)

                {

                    c[i][j] = 0;

                    for (int k = 0; k < y; k++)

                    {

                        c[i][j] = c[i][j] + a[i][k] * b[k][j];

                    }

                }

            }

            cout

                    << "\n-----------------------------------------------------------\n";

            cout << "\n\nEncoded Matrix :\n\n";

            for (i = 0; i < x; i++)

            {

                for (j = 0; j < x; j++)

                {

                    cout << "\t" << c[i][j];

                }

                cout << "\n\n";

            }

        getch();

        return 0;

    }