C Program to 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" );
    }
}

Output

 Enter the order of the matrix
 2   2 
Enter the co-efficents of the matrix
 34   70 
 45   90 
Enter the numbers of two rows to be exchanged
 1   2 
Enter the numbers of two columns to be exchanged
 1   2 
The given matrix is
  34   70 
  45   90 
The matix after interchanging the two rows (  in  the original matrix ) 
  45   90 
  34   70 
The matix after interchanging the two columns (  in  the original matrix ) 
  70   34 
  90   45 

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