Please see attached picture to better understand my question

i have a matrix of cells of [JXI] , cell is square in shape with length "a"

my question is .. is there a way to use FOR loop to assign MIN,MAX coordinate to each cell taking origin (0,0) at one corner

Thanks

"freeimagehosting.net/uploads/3b09575180.jpg"

i was trying following code but no success

int a ; 
                    a = 1;
                      for (int J=1; J<=5; J++)
                    {
                        for (int I = 1; I <= 5; I++)
                    {
                           double Xmin = ((I - 1)*a );

                            double Ymin = ((J - 1) * a);

                            double Xmax = (I * a );
                           double Ymax = (J * a);


                    }

                    }