#define NRUNS 100000
#define NBINS 20

function modifier( x as double ) as double
    return iif(x < 0.5, 2*(0.5 - x), 2*(x - 0.5))
end function

function modrand() as double
    dim as double random1, random2
    do
        random1 = rnd
        random2 = rnd
        if random2 < modifier(random1) then
            return random1
        endif
    loop
end function

function histo( byval bn as uinteger ) as string
    dim as double db = NRUNS/(50*NBINS)
    dim as string h
    while bn > db:
        h = h + "#"
        bn -= db
    wend
    return h

end function

dim as uinteger bins(0 to NBINS-1), i, b
dim as double db = 1./NBINS, rand

randomize timer

for i = 1 to NRUNS
    rand = modrand()
    b = int(rand/db)
    bins(b) += 1
next i

for b = 0 to NBINS-1
    print using "Bin ## (#.## to #.##): & ####";b;b*db;(b+1)*db;histo(bins(b));bins(b)
next b