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C
C Demonstrates the use of sprng and isprng
C A random number stream is initialized and a few random double precision
C numbers and a few integers are printed.
C
C Uncomment the following line to get the interface with pointer checking
C #define CHECK_POINTERS
program sprngf
implicit none
#include "sprng_f.h"
integer streamnum, nstreams, seed
SPRNG_POINTER stream
real*8 rn
integer irn, i, junk
C--- reading in a generator type
integer gtype
#include "genf_types_menu.h"
print *,'Type in a generator type (integers: 0,1,2,3,4,5): '
read *, gtype
C---
streamnum = 0
nstreams = 1
seed = 985456376
C initialize stream
stream = init_sprng(gtype, streamnum,nstreams,seed,SPRNG_DEFAULT)
print *, 'Print information about new stream:'
junk = print_sprng(stream)
print *, 'Printing 3 random numbers in [0,1):'
do 100 i = 1, 3
rn = sprng(stream)
write(*,"(f8.6)") rn
100 continue
print *, 'Printing 3 random integers in [0,2^31):'
do 200 i = 1, 3
irn = isprng(stream)
write(*,"(i16)") irn
200 continue
junk = free_sprng(stream)
end
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