[求助] 新人求助 FORTRAN77 变量（变量，变量）是什么意思

     SUBROUTINE GLM20D(FUNC,A,B,C,GASL)                                00009580
      DOUBLE PRECISION FUNC,GASL,X(20),W(20),A,B,C                      00009590
      DATA X/  7.05398896919887533667D-02 , 3.72126818001611443794D-01 ,00009600
     *         9.16582102483273564668D-01 , 1.70730653102834388069D 00 ,00009610
     *         2.74919925530943212965D 00 , 4.04892531385088692237D 00 ,00009620
     *         5.61517497086161651410D 00 , 7.45901745367106330977D 00 ,00009630
     *         9.59439286958109677247D 00 , 1.20388025469643163096D 01 ,00009640
     *         1.48142934426307399785D 01 , 1.79488955205193760174D 01 ,00009650
     *         2.14787882402850109757D 01 , 2.54517027931869055035D 01 ,00009660
     *         2.99325546317006120067D 01 , 3.50134342404790000063D 01 ,00009670
     *         4.08330570567285710620D 01 , 4.76199940473465021399D 01 ,00009680
     *         5.58107957500638988908D 01 , 6.65244165256157538186D 01 /00009690
      DATA W/  1.68746801851113862149D-01 , 2.91254362006068281717D-01 ,00009700
     *         2.66686102867001288550D-01 , 1.66002453269506840031D-01 ,00009710
     *         7.48260646687923705401D-02 , 2.49644173092832210728D-02 ,00009720
     *         6.20255084457223684745D-03 , 1.14496238647690824204D-03 ,00009730
     *         1.55741773027811974780D-04 , 1.54014408652249156894D-05 ,00009740
     *         1.08648636651798235148D-06 , 5.33012090955671475093D-08 ,00009750
     *         1.75798117905058200358D-09 , 3.72550240251232087263D-11 ,00009760
     *         4.76752925157819052449D-13 , 3.37284424336243841237D-15 ,00009770
     *         1.15501433950039883096D-17 , 1.53952214058234355346D-20 ,00009780
     *         5.28644272556915782880D-24 , 1.65645661249902329591D-28 /00009790
      GASL=0.0D 00                                                      00009800
      DO 20 I=1,20                                                      00009810
   20 GASL=GASL+W(I)*FUNC(X(I),A,B,C)                                   00009820
      RETURN                                                            00009830
      END                                                               00009840

SUBROUTINE DNOLBR(X,N,FUNC,EPS,M,Q,F,Y,W1,W2,ICON)                00013120
      IMPLICIT DOUBLE PRECISION (A-H,O-Z)                               00013130
      DIMENSION X(N),F(N),Y(N),W1(N),W2(N),Q(N,N)                       00013140
      ICON=0                                                            00013150
      MMAX=M                                                            00013160
      M=0                                                               00013170
      IC2=0                                                             00013180
      EPS=EPS**2                                                        00013190
      DO 10 I=1,N                                                       00013200
   10 F(I)=FUNC(X,I)                                                    00013210
      FNORM=0D0                                                         00013220
      DO 11 I=1,N                                                       00013230
   11 FNORM=FNORM+F(I)**2                                               00013240
      IF (FNORM.LT.EPS) RETURN                                          00013250
   34 M=M+1                                                             00013260
      DO 15 I=1,N                                                       00013270
   15 Y(I)=X(I)                                                         00013280
      DO 50 I=1,N                                                       00013290
      DO 50 J=1,N                                                       00013300
      Q(I,J)=0D0                                                        00013310
      IF (I.EQ.J) Q(I,J)=Q(I,J)+1                                       00013320
   50 CONTINUE                                                          00013330