c++ - 如何模拟不同面数的骰子卷？

Question

以下代码采用用户提供的骰子边数，然后调用一个函数以返回骰子掷骰的随机结果。但是，我不知道如何生成介于1和提供的数字之间的随机数。

#include <iostream>
    using namespace std;
    int main() {
      int numberOfSides = 0;

      do
      {
        cout << "How many sides do you want the die to have? ";
        cin >> numberOfSides;
        if (numberOfSides <= 0)
        {
          cout << "Error: Please enter a positive integer!" << endl << endl;
        }
      }  while (numberOfSides <= 0);

      int result = rollDie(numberOfSides);
      cout << "You rolled a " << result << endl;
    }

    int rollDie(int numberOfSides) 
    {
      // Complete this function  
    }

Answer 1

作为示例，在C++引用中描述了随机数生成。

请查看here。

您也可以在此处找到说明。我用引用代码完成了您的功能。

请参阅:

#include <iostream>
#include <random>

int rollDie(int numberOfSides)
{
    std::random_device rd;  //Will be used to obtain a seed for the random number engine
    std::mt19937 gen(rd()); //Standard mersenne_twister_engine seeded with rd()
    std::uniform_int_distribution<> dis(1, numberOfSides);
    return dis(gen);
}


int main() {
    int numberOfSides = 0;

    do
    {
        std::cout << "How many sides do you want the die to have? ";
        std::cin >> numberOfSides;
        if (numberOfSides <= 0)
        {
            std::cout << "Error: Please enter a positive integer!\n\n";
        }
    } while (numberOfSides <= 0);

    int result = rollDie(numberOfSides);
    std::cout << "You rolled a " << result << "\n";
}