Ran() function Chapter 7

[luke13]

Hi, my name is Luca
i want to ask you some information regarding the Ran() routine proposed in Numerical Recipes 3rd edition.
I am a Fortran 90 programmer and for many routines in numerical recipes the translation from C++ code to F90 code gives no problem. For the Random routine there is the problem of the 'unsigned long long' integer type that are not supported by the Fortran 90 standard. Has anyone implemented this routine in Fortran 90 or does anyone know how to solve this problem?

Thanks for your help.
--Luca