[求助] 程序出问题

module typedef
  type sm
    real(kind=4) v,n1
  end type
end module

program main
  use typedef
  implicit none
  type(sm)::s1(100),s2(100),s3(100),s4(100),s5(100),s6(100),s7(100),s8(100),s9(100),s10(100),s11(100),s12(100),s13(100)
  character::file1="length.txt",file2="length(2).txt",file3="length(3).txt",file4="length(4).txt",file5="length(5).txt",file6="length(6).txt"
  integer::i,status=0
  real::d1(50),d2(50),d3(50),d4(50),d5(50),d6(50)

  forall(i=1:50) 
     d1(i)=0 
         d2(i)=0 
         d3(i)=0 
         d4(i)=0 
         d5(i)=0 
         d6(i)=0
  end forall

  open(11,file="length1.txt",status="old")
  do i=1,50
    read(11,*,iostat=status) s1(i)%v,s1(i)%n1
        if(status/=0) exit
        d1(s1(i)%v)=s1(i)%n1
                write(*,*) s1(i)%v,s1(i)%n1

  end do


  open(12,file="length(2).txt",status="old")
 do i=1,50
    read(12,*,iostat=status) s2(i)%v,s2(i)%n1
                d2(s2(i)%v)=s2(i)%n1
        if(status/=0) exit

  end do


    open(13,file="length(3).txt",status="old")
  do i=1,50
    read(13,*,iostat=status) s3(i)%v,s3(i)%n1
                d3(s3(i)%v)=s3(i)%n1
                if(status/=0) exit
  end do

    open(14,file="length(4).txt",status="old")
do i=1,50
    read(14,*,iostat=status) s4(i)%v,s4(i)%n1
                d4(s4(i)%v)=s4(i)%n1
                if(status/=0) exit
  end do

    open(15,file="length(5).txt",status="old")
 do i=1,50
    read(15,*,iostat=status) s5(i)%v,s5(i)%n1
                d5(s5(i)%v)=s5(i)%n1
                if(status/=0) exit
  end do

    open(16,file="length(6).txt",status="old")
do i=1,50
    read(16,*,iostat=status) s6(i)%v,s6(i)%n1
                d6(s6(i)%v)=s6(i)%n1
                if(status/=0) exit
  end do


  open(17,file="length7.txt")
do i=1,50
   write(17,*) i, real(d1(i)+d2(i)+d3(i)+d4(i)+d5(i)+d6(i))/real(6)
  end do

  end program

module typedef
  type sm
    real(kind=4) :: v !// 值
    integer :: n !// 出现次数
  end type
end module typedef

program www_fcode_cn
  use typedef
  implicit none
  Integer , parameter :: N_File = 6 !// 6 个文件
  Integer , parameter :: N_Rec  = 50 !// 最多 50 个记录
  character( len = 30 ) ::file( N_File + 1 ) = (/"length1.txt","length(2).txt","length(3).txt","length(4).txt","length(5).txt","length(6).txt","length(7).txt"/)
  !// 上面是 6 个输入文件。加上一个输出文件 length(7).txt
  Type ( sm ) :: d( N_Rec )
  integer :: i , j , ierr
  real :: rv
  d( : )%v = 0.0 !// 所有值一开始为 0.0
  d( : )%n = 0 !// 所有出现次数一开始为 0
  Do i = 1 , N_File !// 循环读取 6 个文件
    Open( 12 , File = Trim(file(i)) , status="old" ) 
    Do !// 循环读取每个文件的每行
      Read( 12 , * , ioStat = ierr ) j , rv
      if( ierr /= 0 ) exit
      d(j)%v = d(j)%v + rv  !// 值叠加上去
      d(j)%n = d(j)%n + 1 !// 出现次数加1
    End Do
    Close( 12 )
  End Do
  open(17,file=Trim(file(N_File+1)))
  Do i = 1 , N_Rec
    if ( d(i)%n == 0 ) then !// 如果从未出现
      rv = 0.0  !// 平均值取 0.0
    else
      rv = d(i)%v / d(i)%n !// 否则，叠加值除以出现次数
    end if
    write(17,*) i , rv ! , d(i)%n !// 可以输出 d(i)%n 出现次数确认没有问题
  End do
end program www_fcode_cn