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RAN0.PAS
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Wrap
Pascal/Delphi Source File
|
1991-05-01
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662b
|
26 lines
FUNCTION ran0(VAR idum: integer): real;
(* RAN0 assumes that the system random number generator is called RANDOM,
with no arguments. Programs using RAN0 must declare the following
variables
VAR
gly: real;
glv: ARRAY [1..97] OF real;
in the main routine. *)
VAR
dum: real;
j: integer;
BEGIN
IF (idum < 0) THEN BEGIN
idum := 1;
FOR j := 1 TO 97 DO dum := random;
FOR j := 1 TO 97 DO glv[j] := random;
gly := random
END;
j := 1+trunc(97.0*gly);
IF ((j > 97) OR (j < 1)) THEN BEGIN
writeln('pause in routine RAN0'); readln END;
gly := glv[j];
ran0 := gly;
glv[j] := random
END;