Randomizing array elements

Hi,

I would like to have a code to get some array "a" with n elements, and fill array "b" with the same elements from "a" but with random sequence.

It should be some "void" function like this:

void Array_Rand(double &a[],double &b[])
  {
   ...
   ...
   ...
  }

For example:

double a[10]={4,7,2,-8,3,-2,1,9,-9,5};
double b[];

After call the Array_Rand function it will generate elements in array "b":

b[10] =  3  7  -9  -2  5  4  -8  2  9  1

All elements came from array "a", but it was randomized.
It's important to not repeat any element.

For example, if the function in the first element of b[0] is iqual to a[3], so the a[3] will not be used anymore.