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!******* Á·Ï°µü´úËã·¨*******

!******** ËùÐèÒªÇó½âµÄ·½³Ì******
!  x(1)=0.2*x(2)+0.1*x(3)+0.3
!   x(2)=0.2*x(1)+0.1*x(3)+1.5
!   x(3)=0.2*x(1)+0.1*x(2)+2
  
!******* 1.jACOBI µü´ú*******
program main

real B(3)
real A(3,3),x(3),s(30)
integer N,k
integer m
real(kind=8) :: eps
real(kind=8) :: xo
integer,parameter:: NM=1000

eps=1.0e-6
!***********ϵÊý¾ØÕó*************
B(1)=0.3
B(2)=1.5
B(3)=2

A(1,2)=0.2
A(1,3)=0.1
A(2,1)=0.2
A(2,3)=0.1
A(3,1)=0.2
A(3,2)=0.1

!***************µü´ú¹«Ê½************
! do k=1,NM,1
!Do i=1,3
!   x(i)=0.0
!end do

20 Do k=1,NM,1

Do i=1,3
  s(i)=0.0  
  Xo=x(i)
  x(i)=0.0
   Do j=1,3
      If(i.NE.j) then
!       S(i)=S(i)+A(i,j)*Xo
       S(i)=S(i)+A(i,j)*X(j)
      End if
   End do
x(i)=B(i)-s(i)

If(abs(xo-x(i)).gt.eps) then
Go to 20
else
  exit
end if

end do
end do

!write(*,*) (x(i),i=1,3)
do j=1,3
  write(*,*) x(j)
end do

end program main
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