return random from its own function

[dunsta]

Hello again,
I have this program that works fine

 #include<stdio.h>
#include<time.h>
int main(void)
{
	srand(time(NULL));
	int x,i;
	for(i=0;i<10;i++)
	{
		printf("%d: %d\n", i, rand()%100+1);
	}
}

but when I try to put the random number generator in its own function, it only returns the same number repeatedly

/* returns a random number between 1 and the paramater */
#include<time.h>
#include<stdio.h>

int func_rand(int n)
{
	srand(time(NULL)); /*rand prototype*/
	return rand()%n+1;
}

any ideas why?

[hk_mp5kpdw]

Because you are continuously calling srand/time which, when called in a loop tend to simply reseed the PRNG with the same value meaning the rand call is effectively reset and returns the same value each time.

Solution: Only call srand once in your program!

[dunsta]

thanks