Changing Random Numbers?

How do I make a function that creates a different random number each time the function is called?

Thanks,
napKIN

first, you need.to.include.<stdlib.h>.for.rand();.Then.put.an ywhere.in.your.program,.....'srand(time(NULL));'.. ...that.will.make.a.new.random.number.each.time.Yo u.must.include.<time.h>.for.that.BTW....I.have.to. use.periods.because.here.at.school.the.space.bar.i s.not.working.now.

Code:

---

#include <iostream>        // cout
#include <time>            // time()
#include <cstdlib>          // srand() & rand()

using namespace std;

int main()
{
  int randNum;

  srand( time(0) );      // or srand( time(NULL) )

  randNum = rand();

  cout << "Your random number is " << randNum << endl;

  return 0;
}

---

Each time this program runs it should have a different set of random numbers. The srand( ) function seeds the rand( ) with the time in seconds since 1972 (erh something). Anyway, the srand( ) call is the key to making it generate different sets of numbers each time.

Good luck.

Thanks alot guys.
Leeman, I'm at school to....only my space bar works;)

napKIN

How can I make it so it creates a random number up to a max. I'm going to use it to deal weapon damage in an RPG. Something like this:

code:
------------------------
damage=rand(5)+10;
------------------------
End code


so that the weapon deals from 10-15 damage.

thanks,

napKIN

low + rand() % (high-low+1)

example for between 1 and 10:

damage=1+rand()%(10-1+1); //1 through 10

Thanks, but I don't understand a couple things...

1. I forget what % means(doh!), I'll check that when I get home though
2. Why "(10-1+1)"? Isn't that the same as 10?


Thanks Leeman

napKIN