need a good implementation of pseudorandom generators

hi,

I am working on a sensor network optimization decision problem. I have
to perform a large number of simulations for it and require a good
pseudorandom generator for it.
I am currently using a suimple implementation based on rand() function.
But if i run the simulation 100 times then on all 100 times it gives
the same set of random values.
I require that the random variable say over an interval of 0.00 to 1.00
should be uniformly distributed and and if i run the simulation 1000
times than with high probability, all values in range [0.0,1.00] gets
covered.

Any pinters will help as my work is struck just because of this issue.


bye,

shiva

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