source: LMDZ6/branches/Amaury_dev/libf/misc/ran1.F @ 5095

Last change on this file since 5095 was 5086, checked in by abarral, 4 months ago

convert labeled do (f77) to do .. end do

  • 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
  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 991 bytes
RevLine 
[524]1!
[1403]2! $Id: ran1.F 5086 2024-07-19 17:54:50Z abarral $
[524]3!
4      FUNCTION RAN1(IDUM)
[2197]5      IMPLICIT NONE
6      REAL RAN1
7      REAL,SAVE :: R(97)
8      REAL,PARAMETER :: RM1=3.8580247E-6,RM2=7.4373773E-6
9      INTEGER,SAVE :: IFF=0
10      integer,save :: ix1,ix2,ix3
11      INTEGER,PARAMETER :: M1=259200,IA1=7141,IC1=54773
12      INTEGER,PARAMETER :: M2=134456,IA2=8121,IC2=28411
13      INTEGER,PARAMETER :: M3=243000,IA3=4561,IC3=51349
14      INTEGER :: IDUM,J
15
[5082]16      IF (IDUM<0.OR.IFF==0) THEN
[524]17        IFF=1
18        IX1=MOD(IC1-IDUM,M1)
19        IX1=MOD(IA1*IX1+IC1,M1)
20        IX2=MOD(IX1,M2)
21        IX1=MOD(IA1*IX1+IC1,M1)
22        IX3=MOD(IX1,M3)
[5086]23        DO J=1,97
[524]24          IX1=MOD(IA1*IX1+IC1,M1)
25          IX2=MOD(IA2*IX2+IC2,M2)
[1403]26          R(J)=(REAL(IX1)+REAL(IX2)*RM2)*RM1
[5086]27      END DO
[524]28        IDUM=1
29      ENDIF
30      IX1=MOD(IA1*IX1+IC1,M1)
31      IX2=MOD(IA2*IX2+IC2,M2)
32      IX3=MOD(IA3*IX3+IC3,M3)
33      J=1+(97*IX3)/M3
[5082]34      IF(J>97.OR.J<1) stop 1
[524]35      RAN1=R(J)
[1403]36      R(J)=(REAL(IX1)+REAL(IX2)*RM2)*RM1
[524]37      RETURN
38      END
Note: See TracBrowser for help on using the repository browser.