#include #include //Library for "rand()" and "srand()". #include //Library for "time()". using namespace std; int number; void printNumbers(int seed) { srand(seed); cout << "Randomness seed: " << seed << endl << "==========" << endl; cout << " Num Seed" << endl; for(int i = 0; i < 10; i++) { number = rand() % 100; cout << "Try #" << i+1 << ": " << number << " " << seed << endl; } } //Previously we made a program that changes the seed every try. But now, we will make the seed change every time a random number is generated. void printTrueRandom(int seed) { srand(seed); cout << "Randomness seed: " << seed << endl << "==========" << endl; cout << " Num Seed" << endl; for(int i = 0; i < 10; i++) { //The same method that we did before. seed = rand(); //Generate a new random number. srand(seed); //Put that number to our new seed. number = rand() % 100; cout << "Try #" << i+1 << ": " << number << " " << seed << endl; } } int main() { cout << "RAW time: " << time(NULL) << endl << endl; int seed = time(NULL); printNumbers(seed); //In this case, the initial seed is the RAW system time, and that seed will be the same to all numbers. cout << endl; printTrueRandom(seed); //In this case, the initial seed is the RAW system time, but every time a number is generated, the seed changes. //Every time we run the program, the numbers will be different, everywhere. return 0; }

[Randomness #4] Almost true random numbers