What does this code mean, Random numbers

[wahhaj]

#include <random>

std::random_device rd;
std::default_random_engine generator(rd()); // rd() provides a random seed
std::uniform_real_distribution<double> distribution(0.1,10);

double number = distribution(generator);

I got this off the internet to use in my program. I know it generates random numbers and I've got it working but I don't know what this code means. I looked at the random header where I found all these commands but I cant seem to understand the syntax. Can someone explain what each line does?

[giblit]

You may want to start with rand() and srand() before jumping into more advanced PRNGs(pseudo random number generators).

As far as your code a std::random_device is a generator for a "random" number. It is supposed to be a "true random" number generator and I don't think is supported on some compilers. std::default_random_engine generator is another PRNG which takes a seed as a constructor. So basically you are picking a random number to see this generator. std::uniform_real_distribution<double> This is just a uniform distribution which makes it so that each "random" number will appear equally likely each time it is called.

[wahhaj]

This makes thing a little clearer albeit still a bit advanced for me I guess. Thanks for the help.