Matrix Calculator Program.cpp

// #include <stdio.h>
#include <iostream.h>
// #include <conio.h>

int main()
{
    clrscr();
    int arr1[20][20], arr2[10][10];
    int result[20][20];
    int m, n;
    int i, j;
    // prompts the user to enter the rows and columns of the matrix
    cout << " Enter the number of rows (m) : ";
    cin >> m;
    cout << " Enter the number of columns (n) : ";
    cin >> n;
    cout << " \n Enter the elements of the 1st matrix \n ";

    for (i = 0; i < m; i++)
    {
        for (j = 0; j < n; j++)
        {
            cout << " Element " << i << " : " << j << " --> ";
            cin >> arr1[i][j];
        }
    }

    cout << "\n Enter the elements of the 2nd matrix : \n ";
    for (i = 0; i < m; i++)
    {
        for (j = 0; j < n; j++)
        {
            cout << " Element " << i << " : " << j << " --> ";
            cin >> arr2[i][j];
        }
    }

    //------------ display matrics -----------------------

    cout << "\n 1st matrix \n ";
    for (i = 0; i < m; i++)
    {
        for (j = 0; j < n; j++)
        {
            cout << " " << arr1[i][j];
        }
        cout << "\n";
    }

    cout << "\n 2nd matrix \n ";
    for (i = 0; i < m; i++)
    {
        for (j = 0; j < n; j++)
        {
            cout << " " << arr2[i][j];
        }
        cout << "\n";
    }
    cout << " \n Resultatn matrix \n";
    int k = 0;
    // multiplies the two matrices together
    for (i = 0; i < m; i++)
    {
        for (j = 0; j < n; j++)
        {
            result[i][j] = 0;
            for (k = 0; k < m; k++)
            {
                result[i][j] = result[i][j] + arr1[i][k] * arr2[k][j];
            }
        } // end of j sub loop
    }     // end of i main loop

    // displays the resultant matrix

    for (i = 0; i < m; i++)
    {
        for (j = 0; j < n; j++)
        {
            cout << result[i][j] << "  ";
        }
        cout << "\n \n";
    }
    return 0;

} // end of main