如何在C++中将离散分布用作类变量

#include <iostream>
#include <random>
#include <map>

using namespace std;

map<int, double> probabilities;
probabilities[1] = 0.2;
probabilities[2] = 0.3;
probabilities[3] = 0.5;

discrete_distribution<int> distribution(probabilities.begin(), probabilities.end());

random_device rd;
mt19937 generator(rd());

int randomValue = distribution(generator);

#include <iostream>
#include <random>
#include <map>

using namespace std;

int main() {
    map<int, double> probabilities;
    probabilities[1] = 0.2;
    probabilities[2] = 0.3;
    probabilities[3] = 0.5;

    discrete_distribution<int> distribution(probabilities.begin(), probabilities.end());

    random_device rd;
    mt19937 generator(rd());

    int randomValue = distribution(generator);

    cout << "Random value: " << randomValue << endl;

    return 0;
}