#include <iostream>
#include <omp.h>
#include <time.h>
#include <chrono>
#include <iomanip>
int main()
{
double accuracy;
long numberOfLoops = 10;
std::cout << "Set accuracy: \n";
std::cin >> accuracy;
std::cout << " \n";
double pi = 0;
long minTime = INFINITY;
long maxTime = 0;
long sq_time = 0;
long mt_time = 0;
auto start = std::chrono::high_resolution_clock::now();
auto finish = std::chrono::high_resolution_clock::now();
//Sequenial
std::cout << "Sequential:\n";
for(long k = 0; k<numberOfLoops; k++)
{
pi = 0;
start = std::chrono::high_resolution_clock::now();
////////////////////////
for (double i = 1; i <= accuracy; i++)
{
pi += (1 / (i*i));
}
////////////////////////
finish = std::chrono::high_resolution_clock::now();
long currentTime = std::chrono::duration_cast<std::chrono::nanoseconds>(finish - start).count();
sq_time += currentTime;
if (currentTime > maxTime) maxTime = currentTime;
if (currentTime < minTime) minTime = currentTime;
}
//std::cout << "PI number = " << sqrt(pi * 6) << "\n";
std::cout << "Avg time = " << sq_time/numberOfLoops << "ns\n";
std::cout << "Pi = " << std::setprecision(30) << sqrt(pi*6) << "ns\n\n";
pi = 0;
minTime = INFINITY;
maxTime = 0;
//Parallel
std::cout << "Parallel:\n";
for (long k = 0; k<numberOfLoops; k++)
{
pi = 0;
start = std::chrono::high_resolution_clock::now();
////////////////////////
#pragma omp parallel for
for (double i = 1; i <= accuracy; i++)
{
pi += (1 / (i*i));
}
////////////////////////
finish = std::chrono::high_resolution_clock::now();
long currentTime = std::chrono::duration_cast<std::chrono::nanoseconds>(finish - start).count();
mt_time += currentTime;
if (currentTime > maxTime) maxTime = currentTime;
if (currentTime < minTime) minTime = currentTime;
}
//std::cout << "PI number = " << sqrt(pi * 6) << "\n";
std::cout << "Avg time = " << mt_time / numberOfLoops << "ns\n";
std::cout << "Pi = " << std::setprecision(30) << sqrt(pi * 6) << "ns\n\n";
pi = 0;
std::cin.ignore(2);
return 0;
}
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