include iostream include cmath using namespace std int add int int sa

#include <iostream>
#include <cmath>
using namespace std;

int* add(int* a, int sa, int* b, int sb)
{
        int* res_k = new int [sa+1];

        for (int i=0;i<sa-sb;i++)
            res_k[i]=a[i];


        for (int i=sa-sb; i <=sa; i++)
                {
                    res_k[i]=a[i] + b[i-sa+sb];
                }

        return res_k;
}

 class Polinom
{
public:
    int* koef;
    int step;

    Polinom()
    {
    }

   Polinom(int* koef, int step)
    {
        this->koef = koef;
        this->step = step;
    }

    void show()
    {

        for(int i=0;i<step;i++)
                {if (this->koef[i]>0 && i!=0)
                    cout<<" + ";
                cout<<this->koef[i]<<"x^"<<step-i;
                }
            cout<<" + "<<koef[step];
    }

    int calc(int x)
    {
        int res = 0;
        for(int i=0;i<=step;i++)
            res+=koef[i]*pow(x,step-i);
        return res;
    }

    Polinom operator+(Polinom a)
    {
        Polinom b;
        int* res_k;
        if (this->step>a.step)
            {

            res_k = add(this->koef, this->step, a.koef, a.step);
            b.koef = res_k;
            b.step = this->step;

            }

        else
           {

            res_k = add( a.koef, a.step,this->koef, this->step);
            b.koef = res_k;
            b.step = a.step;
            }


        return b;
    }

    Polinom operator*(Polinom a)
    {

    int degree = this->step + a.step;
    int* res_k = new int [degree + 1];
    for (int i = 0; i<degree + 1; i++)
        res_k[i]=0;
    for (int i = 0; i <= this->step; i++)
        for (int j = 0; j <= a.step; j++)
            res_k[i + j] += this->koef[i] * a.koef[j];

    Polinom c(res_k, degree);
    return c;
    }

};


int main()
{
    int k[] = {2,3,8,0,3};
    int l[] = {1,4,7};
    Polinom a(k, 4);
    Polinom b(l, 2);

    (a*b).show();
   // cout<<endl;
   // cout<<a.calc(-2);
    return 0;
}