PWiR Lab3 Zad10

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <omp.h>

long double fRand(long double fMin, long double fMax)
{
    long double f = (double)rand() / RAND_MAX;
    return fMin + f * (fMax - fMin);
}

int player(int playersDarts)
{
    srand(time(NULL));
    long double pi, x, y;
    int score = 0;

    for (int i = 0; i < playersDarts; i++)
    {
        x = fRand(-1.0, 1.0);
        y = fRand(-1.0, 1.0);

        if (x*x + y*y < 1.0)
            score++;
    }
    return score;
}

void main()
{
long double pi;
long const double REAL_PI = 3.141592653589;
int score = 0, playersDarts=100000;

// devide the total number of DARTS between players
double beginParallel = omp_get_wtime();

#pragma omp parallel for
for (int i = 1; i <= 10; i++)
    score += player(playersDarts);

double endParallel = omp_get_wtime();
pi = 4.0 * ((long double)score / (long double)(10*playersDarts));

printf("\n\t Calculated pi : %.12Lf\n", pi);
printf(  "\t       Real pi : %.12Lf\n", REAL_PI);

double beginSerial = omp_get_wtime();
pi = 4.0 * ((long double) player(playersDarts) / (long double)playersDarts);
double endSerial = omp_get_wtime();


printf("\n\t Calculated pi : %.12Lf\n", pi);
printf(  "\t       Real pi : %.12Lf\n", REAL_PI);
}