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DataMuseum.dkPresents historical artifacts from the history of: Rational R1000/400 |
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Length: 2048 (0x800)
Types: Ada Source
Notes: 03_class, FILE, R1k_Segment, e3_tag, package body Random_Numbers, seg_05829d
└─⟦8527c1e9b⟧ Bits:30000544 8mm tape, Rational 1000, Arrival backup of disks in PAM's R1000
└─⟦cfc2e13cd⟧ »Space Info Vol 2«
└─⟦this⟧
with Calendar;
use Calendar;
package body Random_Numbers is
function Random_Int (R : Integer) return Integer is
Rvar : Float;
begin
-- the values used for random number generation avoid overflow
-- on 16 bit (and larger) machines.
-- The values are as given in Gimpel, Programming in SNOBOL.
Rand_Seed := (Rand_Seed * 59) mod 491;
Rvar := Float (Rand_Seed) / 491.0;
-- assume machine rounds, so use r-1
return Integer (Rvar * Float (R - 1));
end Random_Int;
procedure Set_Seed (R : Integer) is
begin
Rand_Seed := R;
end Set_Seed;
begin
-- set initial value from clock (avoid overflow if 16 bit integers)
Rand_Seed := Integer (Float (Seconds (Clock)) / 200.0);
end Random_Numbers;
nblk1=1
nid=0
hdr6=2
[0x00] rec0=1c rec1=00 rec2=01 rec3=000
tail 0x2176588da87e280a2448c 0x42a00088462060003