Test Random Generator

ideone.com.console.txt

Success	time: 0 memory: 3472 signal:0
tester[2054] = 2
tester[24727] = 2
tester[86956] = 2

Success	time: 0 memory: 3472 signal:0
tester[12850] = 2
tester[35134] = 2
tester[46743] = 2
tester[87364] = 2
tester[88344] = 2

Success	time: 0 memory: 3472 signal:0
tester[33858] = 2
tester[73201] = 2
tester[93769] = 2

Success	time: 0 memory: 3472 signal:0
tester[1004] = 2
tester[6958] = 2
tester[77638] = 2

Success	time: 0 memory: 3472 signal:0
tester[1004] = 2
tester[6958] = 2
tester[77638] = 2

Success	time: 0 memory: 3472 signal:0
tester[29647] = 2
tester[62119] = 2

Success	time: 0 memory: 3472 signal:0
tester[4741] = 2
tester[8926] = 2
tester[41015] = 2
tester[45446] = 2

Success	time: 0 memory: 3472 signal:0
tester[15781] = 2
tester[39599] = 2
tester[43793] = 2
tester[72914] = 2
tester[73344] = 2

TestRandomGenerator.cpp

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

int main()
{
    // Random Device
    std::random_device rd;

    // Random Generator
    std::mt19937 generator(rd());
    // In case random device does not work, such as under MinGW
    // std::mt19937 generator(std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::high_resolution_clock::now().time_since_epoch()).count());
    
    // Distribution
    std::uniform_int_distribution<int> distribution(0, 99999);

    // Generate random numbers
    std::map<int, int> tester;
    for (int i = 0; i < 1000; i++)
    {
        tester[distribution(generator)]++;
    }

    // Output duplicate random numbers
    for (const auto& kv : tester)
    {
        if (kv.second > 1)
        {
            std::cout << "tester[" << kv.first << "] = " << kv.second << std::endl;
        }
    }

    return 0;
}