Problem with random number generation

Hello

I wrote this program to generate 256 random numbers. The numbers change each time the code is excuted. But I can't seem to limit the numbers from 1 to -1. Antother thing I can't seem to do is that I want the numbers to go up to 2 decimal placec. i.e. 1.11. I will be highly obliged if someone can point me inthe right direction.

Code:

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int main()
{

    float i,a;

    /* Set evil seed (initial seed) */
    srand( (unsigned)time( NULL ) );

    for (i = 0; i < 256; i++) 
    {
        a=rand()/10000;	
        printf("%f\n",a);
    }
   
    return 0;
}

Code:

a = rand() / (RAND_MAX / 2.0F) - 1;