#include<iostream>
#include<cmath>
#include<ctime>

using namespace std;

double wprost(double arr[], int size, double x);
double horner(double arr[], int size, double x);

int main(){
    double x = 3.5;
    int size;
    cout.precision(10);

    cout << "Podaj rozmiar tablicy" << endl;
    cin >> size;
    double arr[size];

    int j = 5;

    while (j > 0) {
        for (int i = 0; i < size; i++) {
          arr[i] = (float) rand() / RAND_MAX;
        }

        wprost(arr, size, x);
        horner(arr, size, x);

        j--;
    }

    return 0;
}

double wprost(double arr[], int size, double x) {
    clock_t start = clock();
    double y = 0;

    for (int i = 0; i < size; i++) {
        y += arr[i] * pow(x, i);
    }

    cout << "Wynik to: " << y << endl;
    cout << "Czas potrzebny na wykonanie obliczen to: " << float(clock() - start)/CLOCKS_PER_SEC << endl;
    return y;
}

double horner(double arr[], int size, double x) {
    clock_t start = clock();
    double y = 0;

    for (int i = size; i >= 0; i--) {
        y = arr[i] + y * x;
    }

    cout << "Wynik to: " << y << endl;
    cout << "Czas potrzebny na wykonanie obliczen to: " << float(clock() - start)/CLOCKS_PER_SEC << endl;
    return y;
}