RosettaCodeData/Task/Fortunate-numbers/FreeBASIC/fortunate-numbers.basic

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#include "isprime.bas"
#include "sets.bas"
#include "bubblesort.bas"
function prime(n as uinteger) as uinteger
if n = 1 then return 2
dim as integer c=1, p=3
while c<n
if isprime(p) then c+=1
p += 2
wend
return p
end function
function primorial( n as uinteger ) as ulongint
dim as ulongint ret = 1
for i as uinteger = 1 to n
ret *= prime(i)
next i
return ret
end function
function fortunate(n as uinteger) as uinteger
dim as uinteger m = 3
dim as ulongint pp = primorial(n)
while not isprime(m+pp)
m+=2
wend
return m
end function
redim as integer forts(-1)
dim as integer n = 0, m
while ubound(forts) < 6
n += 1
m = fortunate(n)
if not is_in(m, forts()) then
add_to_set(m, forts())
end if
wend
bubblesort(forts())
for n=0 to 6
print forts(n)
next n