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Last change
on this file since 4085 was
1999,
checked in by Laurent Fairhead, 11 years ago
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Merged trunk changes r1920:1997 into testing branch
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Property copyright set to
Name of program: LMDZ
Creation date: 1984
Version: LMDZ5
License: CeCILL version 2
Holder: Laboratoire de m\'et\'eorologie dynamique, CNRS, UMR 8539
See the license file in the root directory
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Property svn:eol-style set to
native
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Property svn:keywords set to
Author Date Id Revision
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File size:
891 bytes
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| 1 | ! |
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| 2 | ! $Id: ran1.F 1999 2014-03-20 09:57:19Z fhourdin $ |
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| 3 | ! |
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| 4 | FUNCTION RAN1(IDUM) |
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| 5 | DIMENSION R(97) |
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| 6 | save r |
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| 7 | save iff,ix1,ix2,ix3 |
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| 8 | PARAMETER (M1=259200,IA1=7141,IC1=54773,RM1=3.8580247E-6) |
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| 9 | PARAMETER (M2=134456,IA2=8121,IC2=28411,RM2=7.4373773E-6) |
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| 10 | PARAMETER (M3=243000,IA3=4561,IC3=51349) |
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| 11 | DATA IFF /0/ |
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| 12 | IF (IDUM.LT.0.OR.IFF.EQ.0) THEN |
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| 13 | IFF=1 |
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| 14 | IX1=MOD(IC1-IDUM,M1) |
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| 15 | IX1=MOD(IA1*IX1+IC1,M1) |
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| 16 | IX2=MOD(IX1,M2) |
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| 17 | IX1=MOD(IA1*IX1+IC1,M1) |
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| 18 | IX3=MOD(IX1,M3) |
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| 19 | DO 11 J=1,97 |
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| 20 | IX1=MOD(IA1*IX1+IC1,M1) |
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| 21 | IX2=MOD(IA2*IX2+IC2,M2) |
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| 22 | R(J)=(REAL(IX1)+REAL(IX2)*RM2)*RM1 |
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| 23 | 11 CONTINUE |
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| 24 | IDUM=1 |
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| 25 | ENDIF |
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| 26 | IX1=MOD(IA1*IX1+IC1,M1) |
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| 27 | IX2=MOD(IA2*IX2+IC2,M2) |
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| 28 | IX3=MOD(IA3*IX3+IC3,M3) |
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| 29 | J=1+(97*IX3)/M3 |
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| 30 | IF(J.GT.97.OR.J.LT.1) stop 1 |
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| 31 | RAN1=R(J) |
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| 32 | R(J)=(REAL(IX1)+REAL(IX2)*RM2)*RM1 |
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| 33 | RETURN |
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| 34 | END |
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