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应助: 0 (幼儿园)
金币: 5.3
散金: 20
帖子: 24
在线: 3.9小时
虫号: 2977137
注册: 2014-02-19
专业: 凝聚态物性 II ：电子结构

[交流] fortran的66阶矩阵对角化

这是一个66阶矩阵，但是我对角化是错误的！请各位大神查看哈！
program MAIN
integer::N
parameter(N=66)
real*8 Hso,B,A,D,S,s6j,I,J,K,Y,X,P
dimension B(N),A(N,N),D(N),S(N,N),Hso(N,N)
CHARACTER*16 C(N)

do i=1,N
   do j=1,N
      Hso(i,j)=0.d0
      end do
   end do

do i=1,6
   Hso(i,i)=2
end do
do i=7,14
   Hso(i,i)=3
end do
do i=15,24
   Hso(i,i)=4
   end do
do i=25,36
   Hso(i,i)=5
   end do
do i=37,50
   Hso(i,i)=6
   end do
do i=51,66
   Hso(i,i)=7
   end dO

do i=1, 66
      do j=1, 66
      A(i,j) = Hso(i,j)
      enddo
   enddo

CALL JCB(N,A,S,1E-16)
   DO 30 I=1,N
   B(I)=A(I,I)
30 CONTINUE
   DO 40 J=1,N-1
     P=J
   DO 50 I=J+1,N
   IF (B(I)<B(P))THEN
      P=I
   ENDIF
50    CONTINUE
   K=B(J)
   B(J)=B(P)
   B(P)=K
40 CONTINUE
   OPEN(2,FILE=\'E.DAT\',STATUS=\'NEW\')
   DO 60 I=1,N
   WRITE(2,200)I,B(I)-A(1,1)
60    CONTINUE

   OPEN(4,FILE=\'FS.DAT\',STATUS=\'OLD\')
   DO 110 I=1,N
   READ(4,300)C(I)
110    CONTINUE
   OPEN(7,FILE=\'VE.DAT\',STATUS=\'NEW\')
   DO 70 I=1,N
   DO 80 J=1,N
   IF(A(J,J).EQ.B(I))THEN
      WRITE(7,200)I,B(I)-A(1,1)
            DO 130 X=1,N
            D(X)=S(X,J)
130          CONTINUE
            DO 140 Y=1,N-1
      P=Y
              DO 150 Z=Y+1,N
               IF (ABS(D(Z)).GT.ABS(D(P)))THEN
                 P=Z
               ENDIF
150             CONTINUE
                 K=D(Y)
                D(Y)=D(P)
              D(P)=K
140             CONTINUE
         P=1
           DO 160 M=1,N
           DO 170 F=1,N
         IF(D(M).EQ.S(F,J).AND.D(M).NE.0)THEN
         WRITE(7,400)S(F,J),C(F)
         ELSEIF(D(M).EQ.S(M,J).AND.D(M).EQ.0)THEN
           WRITE(7,400)S(M,J),C(M)
           EXIT
         ELSEIF(D(M).EQ.0.AND.S(M,J).NE.0)THEN
              WRITE(7,400)D(M),C(P)
           P=P+1
           EXIT
         ENDIF
170         CONTINUE
160       CONTINUE
   ENDIF
80 CONTINUE
70 CONTINUE

100 FORMAT(F25.16)
200 FORMAT(I4,"  ",F25.16)
300 FORMAT(A16)
400 FORMAT(F25.16,"  ",A16)
   CLOSE(4)

   CLOSE(2)
   CLOSE(7)
   stop
end

SUBROUTINE JCB(N,A,S,EPS)
   real*8 A(N,N),S(N,N)
      DO 30 I=1,N
      DO 30 J=1,I
      IF(I-J) 20,10,20
10    S(I,J)=1.d0
      GOTO 30
20    S(I,J)=0.d0
      S(J,I)=0.d0
30    CONTINUE
      G=0.d0
      DO 40 I=2,N
      I1=I-1
      DO 40 J=1,I1
40    G=G+2.d0*A(I,J)*A(I,J)
      S1=SQRT(G)
      S2=EPS/FLOAT(N)*S1
      S3=S1
      L=0
50    S3=S3/FLOAT(N)
60    DO 130 IQ=2,N
      IQ1=IQ-1
      DO 130 IP=1,IQ1
!PRINT*,\'^^^^^^^^^^^^^^^^^^^^^^^^^^^^\'
      IF(ABS(A(IP,IQ)).LT.S3) GOTO 130
      L=1
      V1=A(IP,IP)
      V2=A(IP,IQ)
      V3=A(IQ,IQ)
      U=.5*(V1-V3)
      IF(U.EQ.0.) G=1.d0
      IF(ABS(U).GE.1d-10) G=-SIGN(1.d0,U)*V2/SQRT(V2*V2+U*U)
      ST=G/SQRT(2.d0*(1.d0+SQRT(1.d0-G*G)))
      CT=SQRT(1.d0-ST*ST)
      DO 110 I=1,N
      G=A(I,IP)*CT-A(I,IQ)*ST
!PRINT*,\'^^^^^^^^^^^^^^^^^^^^^^^^^^^^\'
      A(I,IQ)=A(I,IP)*ST+A(I,IQ)*CT
      A(I,IP)=G
      G=S(I,IP)*CT-S(I,IQ)*ST
      S(I,IQ)=S(I,IP)*ST+S(I,IQ)*CT
110    S(I,IP)=G
      DO 120 I=1,N
      A(IP,I)=A(I,IP)
120    A(IQ,I)=A(I,IQ)
      G=2.d0*V2*ST*CT
      A(IP,IP)=V1*CT*CT+V3*ST*ST-G
      A(IQ,IQ)=V1*ST*ST+V3*CT*CT+G
      A(IP,IQ)=(V1-V3)*ST*CT+V2*(CT*CT-ST*ST)
      A(IQ,IP)=A(IP,IQ)
130    CONTINUE
      IF(L-1) 150,140,150
140    L=0
      GOTO 60
150    IF(S3.GT.S2) GOTO 50
      RETURN
      END
请各位大神帮帮嘛！

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