#include #include #include #include int main() { //Total here means the range from 1 to total unsigned long long total = 100000000; //fnum here means any number between the range so that it has a non-zero probability unsigned long long fnum = 646965; std::default_random_engine random(time(0)); std::uniform_int_distribution randomgen(1 , total); auto start = std::chrono::steady_clock::now(); for (int i = 1 ; i > 0 ; i++) { unsigned long long num = randomgen(random); if(num == fnum) { auto end = std::chrono::steady_clock::now(); std::cout << "\n\n\nSuccess Found: " << num << "\n"; std::cout << "Iterations: " << i << "\n\n"; std::cout << "Average Iterations per second: " << ((i * 1.0)/std::chrono::duration_cast (end - start).count())*1000000 << "\n\n"; std::cout << "Time Elapsed in seconds: " << std::chrono::duration_cast (end - start).count() / 1000000.0 << " s\n"; std::cout << "Time Elapsed in microseconds: " << std::chrono::duration_cast (end - start).count() << " µs\n"; std::cout << "Time Elapsed in nanoseconds: " << std::chrono::duration_cast (end - start).count() << " ns\n"; std::cout << "Time Elapsed in minutes: " << std::chrono::duration_cast (end - start).count()/60 << ":" << std::chrono::duration_cast (end - start).count()%60 << " mins\n\n"; std::cout << "Probability in words: 1 in a " << total<< "\n"; std::cout << "Probability in percentage: " << 1.0/total << "%\n"; break; } //Uncomment this if you dare //std::cout << num << "\n"; } return 0; } //Eof

Probability of happening