Help with rand() and srand() please :) 1

[MikeBronner]

I'm having the problem when using the following code, that it creates the same number, instead of different random numbers:

for (int i=0; i<10; i++)
{
srand((unsigned) time(NULL));
int nRandNum = rand() % (nMaxNum - nMinNum + 1) + nMinNum;
}

Could anyone PLEASE help me out with a workaround to return random numbers? Thanks ;-)

Mike B. Take Care,
Mike

 

[VincentP]

You should use srand() only once, in this case probably right before the for loop. srand() sets the starting point for rand(). Once a starting point is selected, you can use rand() alone to give a sequence of numbers.

Your problem comes to this: your loop gets executed very fast (in certainly less than a second), so using srand(timer(NULL)) before each call to rand() means to reset the sequence always to the same number.

Vincent

 

[MikeBronner]

Is there a way to specify time in milliseconds, instead of seconds? The reason being that I need to make many random numbers off of different seeds in a small period of time.
Thanks ;-) Take Care,
Mike