Today's blogpost is about answers to coding problems:

Print concentric squares of a given square matrix.

void PrintConcentricSquare(int [,] m, int n) //params: matrix and dimension
{
  if (n%2 == 1)
  {
   int center =n/2;
   int numSquares = center + 1;
   for (int i =0; i < numSquares; i++)
   {
         for (int x=center-i;x<=center+i;x++)
           for(int y=center-i;y<=center+i;y++)
              Console.Write('{0} ',m[x,y]);
         Console.Writeline();
   }
   }
   else
   {
       int center = n/2;
       int numSquares = center;
       for (int i =0; i < numSquares; i++)
       {
         for (int x=center-i-1;x<center+i+1;x++)
           for(int y=center-i-1;y<center+i+1;y++)
              Console.Write('{0} ', m[x,y]);
         Console.WriteLine();
       }
   }
}
The above algorithm can be modified to print just the boundary of the concentric squares. When x is not at the lower or upper limit and y is not at the lower or upper limit, escape printing the cell value.


#codingexercise 
Double  GetNthRootProductEachTermRaisedPMinusQ (Double [] A,Double  p, Double q)
{

If ( A== null) return 0;

Return A.NthRootProductEachTermRaisedPMinusQ(p, q);

}