How to use shuffle or random function

[TranspoLord]

I need help on using the shuffle, random, or random_shuffle function. I looked at the page on cplusplus, but it just confuses me, a lot. This is kinda linked to my other problem http://www.cplusplus.com/forum/general/131733/ because i have not yet solved it. Some say to use the random_shuffle (http://www.cplusplus.com/reference/algorithm/random_shuffle/) so i try using it, but it confuses me too much.
especially this part

random_shuffle(people.begin(), people.end(), something);

Its saying that there's no member for begin and end, or something like that.
so then I do this

random_shuffle(people.begin(0), people.end(number));

and then its says expected primary expression before [&int]
number is the number of people there are, that the user inputs.
people[number] is a string array used for storing names of people. I need it to be randomized so it works with my code from my other topic. (http://www.cplusplus.com/forum/general/131733/)
or, just so that it works by itself, and I'll eventually find a way to incorporate it into my code. Please do not use std::, I always use

#include <iostream>
#include <math.h>
using namespace std; 

before every program. The std:: just confuses me.


Edit: To reply to Peter87's post, do I need any other #include with the random_shuffle function, other than iostream and math.h?

[Peter87]

people is an array so it doesn't have have member functions like begin() and end(). Instead you will have to use the non-member functions with the same name.

random_shuffle(begin(people), end(people));

If you are using an older compiler (pre C++11) the above might not work. You could then do this instead

random_shuffle(people, people + n);

where n is the number of elements in people.

If you want to understand why it should be this way you should read up on iterators.