a random number creator--PLZ help !

:confused: hi , i've been trying hard , but it doesn;t work :

for a combat system ( to do dammage etc ) i need random numbers at first using the rand(); comando works , but it will only give a random value one time and never changes it back.
also I need to let it be influence by ( for example ) strenght level or so. how can I do this ? I really can't figure it out...

thanks :D

You need to seed your random number generator once at the start of your program. Subsequent calls to rand() will then give you different values. Look up the srand() function.

Quote:

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Originally Posted by MistyWind

for a combat system ( to do dammage etc ) i need random numbers at first using the rand(); comando works , but it will only give a random value one time and never changes it back.

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first you should know two things about 'rand()' :
1. its a function not a 'command'.
2. it generates pseudo-random numbers not random numbers.

use srand() to initialize the random number generator with a seed number. To get a fairly random seed number , send function time() (defined in ctime , returns the number of seconds since 1970) with the argument NULL.

this is how it would look like :

Code:

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...
srand(time(0));
int random_number = rand() % 10 /* makes sure the random number won't be bigger than 10 */
cout << random_number << endl;
...

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you can get different numbers each time now.

Quote:

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Originally Posted by MistyWind

also I need to let it be influence by ( for example ) strenght level or so. how can I do this ? I really can't figure it out...

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This can be done in many different ways. Just think for a while , i don't wanna spoil the fun ;)

thanks very much brain cell

We can't do much unless you show us some code.

Sounds to me like you're calling srand() a lot, if you seem to be getting the same number out of rand()

or he's not calling it at all. Show us your code so we don't start assuming things :)

ok , I am going to write a new program on random numbers see if i get more troubles . well thank you very much !

yay this code works ! :

Code:

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#include <iostream>

using namespace std; // using standard libary //

int main ( int argc , char** argv )

{
    srand(time(0));
int random_number = rand() % 10 ;// not larger than 10 //
cout << random_number << endl; //out puts it //
cin.ignore(); // waits for an input and ignores it //
}

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thank you 2 very much :) i'll post it when I've made it being influenced by strenght etc.

ty ! :D