การแจกแจง

#include <iostream>
#include <random>

int main() {
    std::mt19937 gen(1);
    std::uniform_int_distribution<int> dist(1, 100);
    std::cout << "value: " << dist(gen) << '\n';
    return 0;
}

#include <iostream>
#include <random>

int main() {
    std::mt19937 gen(5);
    std::uniform_int_distribution<int> die(1, 6);
    for (int i = 0; i < 5; ++i) std::cout << die(gen) << ' ';
    std::cout << '\n';
    return 0;
}

#include <iostream>
#include <random>
#include <iomanip>

int main() {
    std::mt19937 gen(3);
    std::uniform_real_distribution<double> dist(0.0, 1.0);
    std::cout << std::fixed << std::setprecision(3) << dist(gen) << '\n';
    return 0;
}

#include <iostream>
#include <random>

int main() {
    std::mt19937 gen(8);
    std::bernoulli_distribution coin(0.5);
    for (int i = 0; i < 5; ++i) std::cout << (coin(gen) ? 'H' : 'T');
    std::cout << '\n';
    return 0;
}

#include <iostream>
#include <random>
#include <iomanip>

int main() {
    std::mt19937 gen(11);
    std::normal_distribution<double> dist(100.0, 15.0);
    std::cout << std::fixed << std::setprecision(1) << dist(gen) << '\n';
    return 0;
}

#include <iostream>
#include <random>

int main() {
    std::mt19937 gen(20);
    std::uniform_int_distribution<int> d(1, 3);
    int counts[4] = {0};
    for (int i = 0; i < 12; ++i) counts[d(gen)]++;
    std::cout << counts[1] << ' ' << counts[2] << ' ' << counts[3] << '\n';
    return 0;
}

#include <iostream>
#include <random>

int main() {
    std::mt19937 gen(30);
    std::poisson_distribution<int> dist(4.0);
    for (int i = 0; i < 5; ++i) std::cout << dist(gen) << ' ';
    std::cout << '\n';
    return 0;
}

#include <iostream>
#include <random>

int main() {
    std::uniform_int_distribution<int> d(10, 50);
    std::cout << "range: " << d.a() << " to " << d.b() << '\n';
    return 0;
}

#include <iostream>
#include <random>

int main() {
    std::mt19937 gen(40);
    std::normal_distribution<double> dist(0.0, 1.0);
    dist(gen);
    dist.reset();
    std::cout << "distribution state reset\n";
    return 0;
}

#include <iostream>
#include <random>
#include <string>

int main() {
    std::string colors[] = {"red", "green", "blue"};
    std::mt19937 gen(50);
    std::uniform_int_distribution<int> pick(0, 2);
    std::cout << colors[pick(gen)] << '\n';
    return 0;
}

#include <iostream>
#include <random>
#include <iomanip>

int main() {
    std::mt19937 gen(60);
    std::uniform_real_distribution<double> u(0.0, 1.0);
    int inside = 0, n = 10000;
    for (int i = 0; i < n; ++i) {
        double x = u(gen), y = u(gen);
        if (x * x + y * y <= 1.0) ++inside;
    }
    std::cout << std::fixed << std::setprecision(2) << 4.0 * inside / n << '\n';
    return 0;
}