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  1. #include <iostream>
  2. #include <iomanip>
  3. #include <random>
  4.  
  5. using namespace std;
  6.  
  7. int main() {
  8.     const unsigned long long n = 100000000ULL; // liczba punktów
  9.     unsigned long long n0 = 0;                 // punkty w kole
  10.  
  11.     mt19937_64 gen(random_device{}());
  12.     uniform_real_distribution<long double> dist(0.0L, 1.0L);
  13.  
  14.     for (unsigned long long i = 0; i < n; ++i) {
  15.         long double x = dist(gen);
  16.         long double y = dist(gen);
  17.  
  18.         if (x * x + y * y <= 1.0L)
  19.             n0++;
  20.     }
  21.  
  22.     long double pi = 4.0L * n0 / n;
  23.  
  24.     cout << fixed << setprecision(30);
  25.     cout << "Liczba punktów n = " << n << endl;
  26.     cout << "Liczba punktów w kole n0 = " << n0 << endl;
  27.     cout << "π ≈ " << pi << endl;
  28.  
  29.     return 0;
  30. }
Success #stdin #stdout 3.45s 5312KB
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Standard input is empty
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Liczba punktów n = 100000000
Liczba punktów w kole n0 = 78539768
π ≈ 3.141590719999999999989884202911
https://ideone.com/idOi0M
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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