Interchange any two Rows & Columns in the given Matrix

#include <stdio.h>

 

void main()

{

    static int array1[10][10], array2[10][10];

    int i, j, m, n, a, b, c, p, q, r;

 

    printf("Enter the order of the matrix \n");

    scanf("%d %d", &m, &n);

    printf("Enter the co-efficents of the matrix \n");

    for (i = 0; i < m; ++i)

    {

        for (j = 0; j < n; ++j)

        {

            scanf("%d,", &array1[i][j]);

            array2[i][j] = array1[i][j];

        }

    }

    printf("Enter the numbers of two rows to be exchanged \n");

    scanf("%d %d", &a, &b);

    for (i = 0; i < m; ++i)

    {

        /*  first row has index is 0 */

        c = array1[a - 1][i];

        array1[a - 1][i] = array1[b - 1][i];

        array1[b - 1][i] = c;

    }

    printf("Enter the numbers of two columns to be exchanged \n");

    scanf("%d %d", &p, &q);

    printf("The given matrix is \n");

    for (i = 0; i < m; ++i)

    {

        for (j = 0; j < n; ++j)

            printf(" %d", array2[i][j]);

        printf("\n");

    }

    for (i = 0; i < n; ++i)

    {

        /*  first column index is 0 */

        r = array2[i][p - 1];

        array2[i][p - 1] = array2[i][q - 1];

        array2[i][q - 1] = r;

     }

    printf("The matix after interchanging the two rows(in the original matrix) \n");

    for (i = 0; i < m; ++i)

    {

        for (j = 0; j < n; ++j)

        {

            printf(" %d", array1[i][j]);

        }

        printf("\n");

     }

    printf("The matix after interchanging the two columns(in the original matrix) \n");

    for (i = 0; i < m; ++i)

    {

        for (j = 0; j < n; ++j)

            printf(" %d", array2[i][j]);

        printf("\n");

    }

}