Random numbers.md

Random numbers

The easiest way is to use rand(), the distribution is not perfect however. Initialize with srand(time(0)) exactly once, include stdlib.h:

#include <stdio.h>
#include <stdlib.h>

srand(time(0)); // assigns seed
int r = rand(); // random integer between 0 and RAND_MAX

Usually set to a range using % n where n is the range.

In C++

Use the following lines:

mt19937 generator{random_device{}()};
uniform_int_distribution<> dist(a,b); //creates a random, uniform distribution from a to b

int random_number = dist(generator);