Problem with rand()

[D4rk]

I am having a issue with rand(), I only really half way through the tutorial so sorry if this is a obvious issue but was a bit bored so figured I would try to reinforce some of the things I am learning.

The number being generated is always 2 this is my code:

#include <iostream>
#include <cstdlib>
#include <stdlib.h>

using namespace std;

int main ()
{
    int random = rand() % 10 + 1;
    int guess;
    
    do {
        cout << "Guess the number between 1-10:" << endl;
        cin >> guess;
        if (guess == random)
            cout << "Congratulations! You guessed correct." << endl;
        else
            cout << "Sorry incorrect.\n" << endl;
    } while (guess != random);
    
    system("PAUSE");
}

The odd thing is when I made a test script and used this

random = rand() % 10 + 1;
cout << random;
random = rand() % 10 + 1;
cout << random;

and repeated it, it would always generate a different number?


Also just as a side question is there anything wrong with using only endl and not \n I tend to prefer to use endl as it seems cleaner to read but I feel obliged to use \n.

[Computergeek01]

In any application where you plan on using "rand()" always call "srand()" first, but only ever call it once per instance of the application: http://www.cplusplus.com/reference/clibrary/cstdlib/srand/

This function sort of initializes "rand()" (this is not really what it does but it is a simplified way of looking at it).

[D4rk]

Seems to be good now I linked it with time like it says.

Cheers for help.