Pasted

#include <iostream>
#include <fstream>
#include <cstring>
 #define precizie 0.001
#define set_precizie 2
 using namespace std;
 bool is_numar(char x)
{
    if (x >= '0' && x <= '9')
    {
        return true;
    }
    return false;
}
 void anulare_space(char x[])
{
    while (x[0] == ' ')
    {
        strcpy(x, x+1);
    }
}
 int det_grad(char x[])
{
    char *p = strchr(x, '^');
    if (p == NULL)
    {
        if (strchr(x, 'x') != NULL)
        {
            return 2;
        }
        else
        {
            return 1;
        }
    }
    else
    {
        return (p[1] - '0') + 1;
    }
}
 int det_semn(char x[])
{
    int sem = 1;
     if (strchr("+-", x[0]) != NULL)
    {
        if (x[0] == '-')
        {
            sem = -1;
        }
        strcpy(x, x+1);
    }
     return sem;
}
 int det_numar(char x[])
{
    int num = 0, i = 0;
    while (is_numar(x[i]) == true)
    {
        num *= 10;
        num += x[i] - '0';
         i++;
    }
    if (x[i] == 'x' && num == 0)
    {
        num = 1;
    }
    return num;
}
 void citire(int v[])
{
    ifstream fin("date.in");
    char sir[1000], *p;
    int num, grad, semn;
     fin.getline(sir, 950);
    p = strtok(sir, " ");
     while(p)
    {
        anulare_space(p);
         semn = det_semn(p);
        grad = det_grad(p);
        num = det_numar(p);
         if (grad > v[0])
        {
            v[0] = grad;
        }
         v[grad] = semn * num;
         p = strtok(NULL, " ");
    }
    fin.close();
}
 float putere(float a, int b) /* a la putere b*/
{
    float prod = 1;
    for (int i=1; i <= b; i++)
    {
        prod *= a;
    }
    return prod;
}
 float abs(float x)
{
    if (x < 0)
    {
        x *= -1;
    }
    return x;
}
 float suma(int v[], float x)
{
    float sum = 0;
    for (int i=1; i<= v[0]-1; i++)
    {
        sum += v[i] * putere(x, i-1);
    }
    return sum;
}
 int initi_indice(int v[])
{
    int indice = 0;
    float sum = v[1];
    float coef_dom = 0;
     //cout << 0 << " -> ";
    //cout << coef_dom << "   " << sum << endl;
     while (abs(coef_dom) <= abs(sum))
    {
        indice -= set_precizie;
        coef_dom = v[v[0]] * putere(indice, v[0]-1);
        sum = suma(v, indice);
    }
    return indice;
}
 /*int float_to_int(float a)
{
    a *= 10000;
    while (a%10 == 0)
    {
        a /= 10;
    }
    return a;
}
*/
/*float recalibrare(float a)
{
    int aux_a, aux_prec;
    aux_a = float_to_int(a);
    aux_prec = float_to_int(precizie);
     while (a!= 0)
    {
        a /= 10;
        nr_cif++;
    }
}
*/
void det_root(int v[])
{
    ofstream fout("date.out");
     float sum = v[1];
    float coef_dom = 0; // 0^x = 0, pt. orice x ap lui R*
    int nr_rad = 1;
    bool semn, interval;
     float indice = initi_indice(v);
     if (v[1] < 0)
    {
        semn = false;
    }
    else
    {
        semn = true;
    }
     while ((abs(coef_dom) <= abs(sum)) || indice <= 0)
    {
        if (coef_dom + sum == 0)
        {
            fout << "radacina[" << nr_rad << "] este egala cu: " << indice << endl;
            nr_rad++;
        }
        else
        {
            if (coef_dom + sum < 0 && semn == true)
            {
                if (interval == false)
                {
                    interval = true;
                     nr_rad++;
                    fout << "radacina[" << nr_rad << "] apartine intervalului: (" << indice << "  ;  ";
                }
                else
                {
                    interval = false;
                    fout << indice << ") " << endl;
                }
                semn = false;
            }
            else
            {
                if(coef_dom + sum > 0 && semn == false)
                {
                    if (interval == false)
                    {
                        interval = true;
                         nr_rad++;
                        fout << "radacina[" << nr_rad << "] apartine intervalului: (" << indice << "  ;  ";
                    }
                    else
                    {
                        interval = false;
                        fout << indice << ") " << endl;
                    }
                 }
                semn = true;
            }
        }
          indice += precizie;
        //indice = recalib
         cout << indice << " -> ";
          coef_dom = v[v[0]] * putere(indice, v[0]-1)*1.00;
        sum = suma(v, indice);
         cout << coef_dom << "   " << sum << " -> " << coef_dom + sum << endl;
    }
}
 int v[10000];
 int main()
{
    citire(v);
    det_root(v);
    return 0;
}