使用以下程序我遇到错误。
Program COM
!Input
!No of Atoms
!No of Iterations
!Respective Positions.
!As of now for homogeneous clusters.
Implicit None
Real, Parameter :: R8B=selected_real_kind(10)
Real, Parameter :: R4B=selected_real_kind(4)
Integer, Parameter :: I1B=selected_int_kind(2)
Integer, Parameter :: I2B=selected_int_kind(4)
Integer, Parameter :: I4B=selected_int_kind(9)
Integer, Parameter :: I8B=selected_int_kind(18)
Real (R8B), Dimension (:,:), Allocatable :: Posx, Posy, Posz
Real (R8B), Dimension (:), Allocatable :: Posx_n, Posy_n, Posz_n
Real (R8B), Dimension (:), Allocatable :: dist_com, avj_dist_com
Integer (I4B), Dimension (:), Allocatable :: bin_array
Real (R8B) :: comx, comy, comz
Integer (I8B) :: nIter, nAtom, dist
Integer (I8B) :: I,J,ii,k
Integer (I1B) :: xyz_format, FlagR, FlagM, Flag_com
Integer (I8B) :: bin
Integer (R8B) :: max_dist
Character (50) POS_file, COM_file,Bin_file
Character (2) jj
Read (*,*) POS_file
Read (*,*) COM_file
Read (*,*) Bin_file
Read (*,*) nAtom
Read (*,*) nIter
Read (*,*) xyz_format
Read (*,*) max_dist, bin
! if Flag_com == 1 then compute dist from COM
! if its 0 then specify the atom no and g(r) will be computed..
! i.e. no of atoms from that atom between dist r and r + dr
Allocate (Posx(nAtom,nIter))
Allocate (Posy(nAtom,nIter))
Allocate (Posz(nAtom,nIter))
! xyz_format = 0 ==> old_ks
! xyz_format = 1 ==> xmakemol
! xyz_format = 2 ==> Envision
write(*,*)POS_file
Open (unit=99, file=POS_file)
if (xyz_format == 0 ) then
do i = 1,nIter
read(99,*)
do j = 1,nAtom
read(99,*)ii,Posx(j,i),Posy(j,i),Posz(j,i),ii
enddo
enddo
elseif (xyz_format == 1 ) then
do i = 1,nIter
read(99,*)ii
read(99,*)
do j = 1,nAtom
read(99,*)jj,Posx(j,i),Posy(j,i),Posz(j,i)
enddo
enddo
elseif (xyz_format == 2 ) then
read(99,*)
read(99,*)
read(99,*)
read(99,*)
do i = 1,nIter
do j = 1,nAtom
read(99,*)
read(99,*)Posx(j,i),Posy(j,i),Posz(j,i)
enddo
enddo
endif
Close (99)
Write (*,'(\1x,"Reading Complete")')
allocate (avj_dist_com (nIter))
allocate (dist_com (nAtom))
avj_dist_com = 0.0d0
dist_com = 0.0d0
Allocate (Posx_n(nAtom))
Allocate (Posy_n(nAtom))
Allocate (Posz_n(nAtom))
Allocate (Bin_Array(bin))
Posx_n = 0.0d0
Posy_n = 0.0d0
Posz_n = 0.0d0
bin_array = 0.0d0
Open (unit=2, file=COM_file)
Do I = 1, nIter
comx = 0.0d0
comy = 0.0d0
comz = 0.0d0
Do J = 1, nAtom
comx = comx + Posx(j,i)
comy = comy + Posy(j,i)
comz = comz + Posz(j,i)
Enddo
comx = comx/nAtom
comy = comy/nAtom
comz = comz/nAtom
Write (*,*) i, comx, comy, comz
Do J = 1, nAtom
Posx_n (j) = Posx(j,i) - comx
Posy_n (j) = Posy(j,i) - comy
Posz_n (j) = Posz(j,i) - comz
dist_com (j) = dsqrt ( Posx_n(j)*Posx_n(j) &
+ Posy_n(j)*Posy_n(j) &
+ Posz_n(j)*Posz_n(j) )
avj_dist_com (i) = avj_dist_com(i) + dist_com(j)
Enddo
avj_dist_com(i) = avj_dist_com(i)/nAtom
Do j = 1, nAtom
dist = dist_com (j) * dfloat((bin/max_dist))
bin_array(dist) = bin_array(dist) + 1
Enddo
write (2,'(2x,i6,143(2x,f10.7))') I, avj_dist_com(i),(dist_com(k),k=1,nAtom)
write(*,*) i
Enddo
close (2)
Open (unit=3, file=Bin_file)
do i = 1, bin
write (3,'(2x,i6,4x,i8)') i , bin_array(i)
enddo
close (3)
deAllocate (Posx)
deAllocate (Posy)
deAllocate (Posz)
deAllocate (Posx_n)
deAllocate (Posy_n)
deAllocate (Posz_n)
deallocate (avj_dist_com)
deallocate (dist_com)
deallocate (bin_array)
Stop
End Program COM
错误看起来像
Real(KIND=r8b), Dimension (:), Allocatable :: Posx, Posy, Posz
1
Error: Integer expression required at (1)
还有更多
我该如何纠正这些?
答案 0 :(得分:2)
类型的kind参数必须是整数常量表达式。当你使用命名常量R4B
和selected_real_kind
时,你将后一部分缩小了。
但是,这就是错误消息所说的,您还没有使用整数常量表达式。您应该注意到Integer, Parameter :: R8B=selected_real_kind(10)
Integer, Parameter :: R4B=selected_real_kind(4)
返回一个整数值,即使是所选实数类型的类型。因此,您可以使用
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