Error: Invalid character 0xE2 at (1)

Bonjour,
je viens d'écrire mon premier programme en fortran

IMPLICIT REAL*8 (A-H,O-Z)
      REAL*8 b,K,sz,lz,adec,gR,gK,fff
      INTEGER Z,A
      CHARACTER*1 plus,moins,etoile,indic,blanc,pop
      plus='+'
      moins='-'
      etoile='*'
      blanc=' '
      MG=1
      IW=2
      open(MG,status='old',file='magnetic.dat',form='formatted')
      open(IW,status='new',file='magnetic.res',form='formatted')
      CONTINUE
      gsfreep=5.585d0
      gsfreen=-3.826d0
      glp=1.0d0
      gln=0.0d0
      gs=(7.0d0/10.0d0)*gsfreep
      read(1,*)K,sz,lz
      gK=(1.0/K)*(gs*sz+glp*lz)
      read(1,*)Z,A
      gR=Z/A
      read(1,*)adec
      f=1.0/(gk-gR)
      fl=gR-glp
      fff=gs+gK−2.0d0*glp
      tig=(−1.0d0)**lz
      tif=(1.d0/2.0d0)*tig
      b=f*(fl*adec−tif*fff)
      write(2,*)b
      CONTINUE
      RETURN
      END

il m'affiche ces erreurs
 26 |       fff=gs+gK−2.0d0*glp
      |                 1
Error: Invalid character 0xE2 at (1)
magnetic.FOR:27:13:

   27 |       tig=(−1.0d0)**lz
      |             1
Error: Invalid character 0xE2 at (1)
magnetic.FOR:27:12:

   27 |       tig=(−1.0d0)**lz
      |            1
Error: Syntax error in expression at (1)
magnetic.FOR:29:20:

   29 |       b=f*(fl*adec−tif*fff)
      |                    1
Error: Invalid character 0xE2 at (1)
magnetic.FOR:29:19:

   29 |       b=f*(fl*adec−tif*fff)
      |                   1
Error: Expected a right parenthesis in expression at (1)
qu'il qu'un peut m'aider svp ?

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