#include "header.h"

void pascalTab(int ** tab, int n) // tworzenie tablicy pascala
{
    for(int i=0;i<n;i++)
    {
        tab[i][0] = 0;
        tab[0][i] = 1;
    }
    for(int i=1;i<n;i++)
     {
        for(int j=1;j<n;j++)
            {
                tab[j][i] = tab[j-1][i-1] + tab[j][i-1];
            }
     }
};

bool getPolynomial(string line, int * c, int * e,  int &word, int &d)
{
    int size = strlen(line.c_str());
    int i = 1;
    bool cprog = true;
    bool eprog = false;
    word = -1;
    d = 0;

        while(i<size)
        {
            if (line[i] == '.') // jesli natrafimy na kropke to wyswietlamy komunikat i wychodzimy z funkcji
            {
                if(cprog == true)
                    {
                        cout << "C is not an integer.\n";
                        return false;
                    }
                if(eprog == true)
                    {
                        cout << "E is not an integer.\n";
                        return false;
                    }

            }
            if (i==1 && line[i] == 'n') // jesli pierwszy wyraz w linii to odrazu n to domyslnie c ustawiamy na 1
            {
                word++;
                c[word] = 1;
                cprog = false;
                eprog = true;
            }
            if (line[i] == '-') // jesli mamy znak to wiemy ze dostaniemy kolejna wartosc w wielomianie
            {
                word++;
                cprog = true;
                eprog = false;

                if (line[i+1] == 'n')
                {
                    c[word] = -1;
                }
                else
                {
                    c[word] = 0;
                }
            }
            if (line[i] == '+')
            {
                word++;
                cprog = true;
                eprog = false;

                if (line[i+1] == 'n')
                {
                    c[word] = 1;
                }
                else
                {
                    c[word] = 0;
                }
            }

            if (line[i]>='0' && line[i] <='9')
            {
                if (i==1)
                {
                    word++;
                }
                if (cprog == true)
                {
                    c[word]*=10;

                    if (c[word] >= 0)
                        c[word]+=line[i] - 48;
                    else
                        c[word]-=line[i] - 48;
                    if (line[i-1] == '-')
                        c[word] *= -1;
                }

                if (eprog == true)
                {
                    e[word]*=10;
                    e[word]+=line[i] - 48;

                    if (e[word] > 100)
                    {
                        cout << "Potega nie miesci sie w przedziale <0,100>\n";
                        return false;
                    }
                }
            }
            if (line[i] == 'n')
            {
                if (line[i+1] != '^')
                e[word] = 1;
                cprog = false;
                eprog = true;
            }

            if (line[i] == ')')
            {
                if(line[i]-1=='n')
                {
                    e[word] = 1;
                }
                break;
            }

    i++;
     }

    i+=2;

     if (line[i] == '-')
     {
        cout << "D is negative integer.\n";
        return false;
     }
     while(i<size)
     {
        if (line[i] == '.')
        {
            cout << "D is not an integer.\n";
            return false;
        }
        d *= 10;
        d += line[i] - 48;
        i++;
     }

return true;

};
void cleanPolynomial(int *c, int *e, int n)
{
    for(int i=0;i<n;i++)
    {
        c[i] = 0;
        e[i] = 0;
    }
};
void calcPolynomial(int *c, int *e, int word, int ** tab, int d)
{
    if (d==0)
    {
        cout << "You can not divide by zero." << endl;
        return;
    }
    int sum = 0;
        for(int i=0;i<=word;i++)
        {
            sum+=c[i];
        }

        if (sum%d != 0)
        {
            cout << "Not always an integer." << endl;
            return;
        }

    int st = e[0];
    int * temp = new int[st+1];
    int * p2 = new int[st+1];

        for(int i=0;i<=st;i++)
        {
            p2[i] = 0;
        }
        for(int w=0;w<=word;w++)
        {
            int stopien = e[w];
            int wsp = c[w];
                for(int i=0;i<=stopien;i++)
                {
                    temp[i] = tab[i][stopien];
                    temp[i] *= wsp;
                }

                for(int i=0;i<=stopien;i++)
                {
                    p2[i] += temp[i];
                }
        };

        for(int i=0;i<=st;i++)
        {
            for(int j=0;j<=word;j++)
            {
                if (e[j]==i)
                {
                    p2[i] -= c[j];
                }
            }
        };

        for(int i=0;i<=st;i++)
        {
            if (p2[i]%d!=0)
            {
                cout << "Not always an integer." << endl;
                return;
            }
        }
cout << "Always an integer." << endl;
};