// Using with rdtsc -aka Getting to work in sololearn compiler /* See: https://en.wikipedia.org/wiki/Time_Stamp_Counter */ #include #include #include //#include <-- use this method for windows machines (uncomment and comment GCC section) //#pragma intrinsic(__rdtsc) /* GCC Style - comment this section if compiling on a windows machine*/ unsigned long long rdtsc() { unsigned int lo, hi; __asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi)); return ((unsigned long long)hi << 32) | lo; } /* -------------------------------- */ class randomNum { private: std::random_device rd; typedef std::mt19937_64 MyGen; MyGen gen; int maxRand; unsigned long long seed; public: randomNum(int maxRange); int returnNum(); std::uniform_int_distribution dist; }; randomNum::randomNum(int maxRange): maxRand(maxRange), gen(rd()), dist(std::uniform_int_distribution<>(1,maxRange)) { //Uncomment for windows use // seed = __rdtsc; //comment out for windows use seed = rdtsc(); gen.seed(seed); } int randomNum::returnNum() { return dist(gen); } int main() { //Initialize Random number generation. Set max range to 100 randomNum rand(100); //setup integer array std::array intArray; intArray.fill(0); // populate array with random rumbers for (int i = 0; i <= 5; ++i) { intArray[i] = rand.returnNum(); } //display contents of array std::cout << "intArray contains:\n"; for (int& x : intArray) { std::cout << " " << x << "\n"; } std::cout << '\n'; return 0; }

Using Random with RDTSC