Oct 3, 2011

C Program to interchange the main diagonal elements of the matrix

C Program to interchange the main diagonal elements of the matrix. This Program will accept a matrix of order M x N and store its elements and interchange the main diagonal elements of the matrix with that of the secondary diagonal elements .   Read more about C Programming Language .

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void main ()
{

 static int ma[10][10];
 int i,j,m,n,a;

 printf ("Enetr the order of the matix \n");
 scanf ("%d %d",&m,&n);

 if (m ==n )
 {
  printf ("Enter the co-efficients of the matrix\n");
  for (i=0;i<m;++i)
  {
   for (j=0;j<n;++j)
   {
    scanf ("%dx%d",&ma[i][j]);
   }
  }

  printf ("The given matrix is \n");
  for (i=0;i<m;++i)
  {
   for (j=0;j<n;++j)
   {
    printf (" %d",ma[i][j]);
   }
   printf ("\n");
  }

  for (i=0;i<m;++i)
  {
   a = ma[i][i];
   ma[i][i]   = ma[i][m-i-1];
   ma[i][m-i-1] = a;
  }

  printf ("THe matrix after changing the \n");
  printf ("main diagonal & secondary diagonal\n");
  for (i=0;i<m;++i)
  {
   for (j=0;j<n;++j)
   {
    printf (" %d",ma[i][j]);
   }
   printf ("\n");
  }
 }
 else
  printf ("The givan order is not square matrix\n");

}    /* end of main() */
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