Call:    printf("\nAt %f the polynomial is: %5.2f\n", x0, evalPoly(x0,a));
    

float evalPoly(float x0, PolyPointer ptr)
{/*evaluate the polynomial */
  PolyPointer c;
  float result = 0;
  for (c = ptr->link; c != ptr; c = c->link) {
      result = result + c->coef*pow(x0, c->expon);
	  printf("%f, %d\n", c->coef,c->expon);
   }
  return result;
}