Generates a random number between 1 and argv[1]

rngesus.cpp

/* rngesus Generates random numbers >= 1 <= argv[1]
 *
 * Project Crew 11/21/2024
 */

#include <iostream>
#include <exception>
#include <random>
using namespace std;

using u32 = uint_least32_t;
using engine = mt19937;

int
main(int argc, char * argv[])
{
    int lim;

    if (argc == 2)
    {
        random_device os_seed;
        const u32 seed = os_seed();

        engine generator(seed);
        try
        {
            lim = stoi(argv[1]);

        } catch (invalid_argument& e)
        {
            cout << "error: I seeketh thine natural number." << endl;
            return EXIT_FAILURE;
        }
        if (lim < 2)
        {
            cout << "error: GOD shall forgiveth thee for coveting such small numbers." << endl;
            return EXIT_FAILURE;
        }
        uniform_int_distribution < u32 > distribute(1, lim);

//        for (int repetition = 0; repetition < 10; ++repetition)
        {
            cout << distribute(generator) << endl;
        }
        return EXIT_SUCCESS;
    }
    cout << endl
         << "  I cannot bring forth a random number because:" << endl
         << endl
         << "  Wrong number of arguments:  $ " << argv[0] << " [ upper limit ]" << endl
         << endl;

    return EXIT_FAILURE;
}