ParProg2 (3)

// https://drive.google.com/drive/folders/1GK3t7PBsRFQp01ApEmk1wb6Scrw_CFA4?usp=sharing

#include <iostream>
#include <vector>
#include <ctime>
#include <cmath>
#include <ppl.h>
using namespace std;

#define N 50'000'000
#define EPS 1e-9

double fun(double x)
{
    double x_2 = x * x;

    return x_2 / (1 + x_2) * sin(x);
}

vector<double> res1(N + 7), res2(N + 7), res3(N + 7);

int main()
{
    setlocale(LC_ALL, "Russian");

    for (int i = 0; i < N; ++i)
        res1[i] = res2[i] = res3[i] = fun(i);

    auto t_start = clock();

    sort(res1.begin(), res1.end());

    auto t_end = clock();

    double time1 = 1.0 * (t_end - t_start) / CLOCKS_PER_SEC;

    cout << "Последовательная реализация: " << time1 << "\n";

    t_start = clock();

    concurrency::parallel_sort(res2.begin(), res2.end());

    t_end = clock();

    double time2 = 1.0 * (t_end - t_start) / CLOCKS_PER_SEC;

    cout << "Параллельная реализация (parallel_sort): " << time2 << "\n";

    cout << "Разница во времени: " << time1 / time2 << "\n";

    t_start = clock();

    concurrency::parallel_buffered_sort(res3.begin(), res3.end());

    t_end = clock();

    double time3 = 1.0 * (t_end - t_start) / CLOCKS_PER_SEC;

    cout << "Параллельная реализация (parallel_buffered_sort): " << time3 << "\n";

    cout << "Разница во времени: " << time1 / time3 << "\n";

    return 0;
}