#ifndef __FUNCS__
#define __FUNCS__

#include <armadillo>
#include <cmath>

#define PRECISION 8

#define N_STEPS_EXP 7

double f(double x);

double u(double x);

void build_g_vec(int n_steps, arma::vec& g_vec);

void build_arrays(
    int n_steps, 
    arma::vec& sub_diag, 
    arma::vec& main_diag, 
    arma::vec& sup_diag,
    arma::vec& g_vec
);
#endif