Show usage of C++ random (tr1 or C++11)

random_example1.cpp

#include <iostream>
#include <boost/tr1/random.hpp>
//#include <tr1/random.hpp> //If your compiler supports it
//#include <random> //If using c++11; then the "tr1::" prefixes can be removed.

using namespace std;

//Random number generator can be global. Use a mutex if program is multi-threaded.
tr1::mt19937 random_generator;

int main(int,char**){
//Set the random seed for the random number generator
//   (the default would be the same numbers every time)
random_generator.seed(time(NULL));

//Create an object that will generate numbers from 1 to 10 inclusive
tr1::uniform_int<int> dice10(1,10);

//A loop to generate 20 numbers. Notice how we pass a random number
//  generator to a number distribution object.
for(int index=0; index<20; index++)
    cout << dice10(random_generator) << endl;
}

See http://stackoverflow.com/questions/9484588/c-generating-random-numbers for where this came from.