Табулирование неявной функции

#include <iostream>
#include "stdlib.h"
#include <math.h>
//------------------------------------------------------------------
double g_Func(double x){
  return ((5.0 - 0.3*x)/(6.8 + 2*x*x));
}
//------------------------------------------------------------------
double f_Func(double x){
  return (6.0 + 9.0*fabs(x));
}
//------------------------------------------------------------------
double h_Func(double y){
  double a = cos(y);
  return (1.14*a*a);
}
//------------------------------------------------------------------
double Alfa0(double a){
  return (-g_Func(a)/f_Func(a) - 15.0);
}
//------------------------------------------------------------------
double Beta0(double a){
  return (-g_Func(a)/f_Func(a) + 15.0);
}
//------------------------------------------------------------------
double Function(double x,double y){
  return (y * f_Func(x) + g_Func(x) + h_Func(y));
}
//------------------------------------------------------------------
double GetRoot(double x,double a,double b,double e,double(*f)(double,double)){
  double alfa       = a,
         beta       = b,
         xi;
  do {
    xi = (alfa + beta)/2.0;