asd

#include <iostream>
using namespace std;

struct Poly {double x,y,z;};
class arr_Poly {
private:
    double *x;
    double *y;
    double *z;
    int n;
public:
    arr_Poly(int);
    ~arr_Poly();
    void set(int,Poly);
    Poly operator[](int) const;
    friend arr_Poly operator+(const arr_Poly&,const arr_Poly&);
    friend arr_Poly operator*(const arr_Poly&,double);
    friend arr_Poly operator*(double,const arr_Poly&);
    void show();
};
Poly operator+(Poly a, Poly b);
Poly operator*(Poly a, double b);

Poly toPoly(double x,double y, double z) {
    Poly tmp;
    tmp.x=x;
    tmp.y=y;
    tmp.z=z;
    return tmp;
}

arr_Poly::arr_Poly(int N) {
    n=N;
    x=new double[n];
    y=new double[n];
    z=new double[n];
    for(int i=0;i<n;i++) {x[i]=i; y[i]=i+1; z[i]=i+2;} //по умолчанию.
}

arr_Poly::~arr_Poly() {
    delete[]x;
    delete[]y;
    delete[]z;
}

void arr_Poly::set(int N, Poly tmp) {
    if(n<N) return;
    x[N]=tmp.x;
    y[N]=tmp.y;
    z[N]=tmp.z;
}

Poly arr_Poly::operator [](int N) const {
    return toPoly(x[N],y[N],z[N]);
}

arr_Poly operator+(const arr_Poly& a,const arr_Poly& b) {
    arr_Poly c(a.n);
    for(int i=0; i<c.n; i++)
        c.set(i,a[i]+b[i]);
    return c;
}

Poly operator+(Poly a, Poly b) {
    return toPoly(a.x+b.x,a.y+b.y,a.z+b.z);
}

Poly operator*(Poly a, double b) {
    return toPoly(a.x*b,a.y*b,a.z*b);
}

arr_Poly operator*(const arr_Poly& a,double k) {
    arr_Poly c(a.n);
    for(int i=0; i<c.n; i++) {
        c.set(i,a[i]*k);
    }
    return c;
}

arr_Poly operator*(double k, const arr_Poly& a) {
    return a*k;
}

void arr_Poly::show() {
    cout<<endl<<"(a)  X^2: "; for(int i=0;i<n;i++) cout<<x[i]<<"  ";
    cout<<endl<<"(b)    X: "; for(int i=0;i<n;i++) cout<<y[i]<<"  ";
    cout<<endl<<"(c)     : "; for(int i=0;i<n;i++) cout<<z[i]<<"  ";
    cout<<endl;
}

int main() {
    arr_Poly a(2),b(2);
    Poly a1,a2,a3,a4;
    a1=toPoly(1,1,1);
    a2=toPoly(2,1,0);
    a3=toPoly(4,3,5);
    a4=toPoly(1,-1,9);
    a.set(0,a1);
    a.set(1,a2);
    b.set(0,a3);
    b.set(1,a4);
    a.show();
    b.show();
    (a+b).show();
    a.show();
    (a*5).show();
}