关于循环数值传递

wxy

[Fortran] 纯文本查看 复制代码

Program hello
  Implicit None
  Real :: distance, row_3, k, dd(1,201801)
  Integer :: row_1, row_2, i, nn, mm, ii
  Real, Allocatable :: lonx(:), laty(:), ilon(:), ilat(:)
!--------------------------------------------------------------------------
!a文件坐标点
!--------------------------------------------------------------------------
  nn = 96232
  Allocate (lonx(nn), laty(nn))

  Open (Unit=11, File='D:\气象数据\tmin\pointmatch_all.txt')
  Do i = 1, nn
    Read (11, *) row_1, row_2, lonx(i), laty(i), row_3
!   write(*,*)lonx(i), laty(i)
  End Do

  Close (Unit=11)
!----------------------------------------------------------------------------
!b文件坐标点
!----------------------------------------------------------------------------
  mm = 201801
  Allocate (ilon(mm), ilat(mm))

  Open (Unit=12, File='D:\气象数据\tmin\test.txt')
  Do ii = 1, mm
    Read (12, *) ilon(ii), ilat(ii), row_3
!    write(*,*)ilon(ii), ilat(ii)
  End Do
  Close (Unit=12)
!----------------------------------------------------------------------------
!两个循环用来计算距离
!----------------------------------------------------------------------------
 !Allocate (dd(mm))!放入坐标点距离
  Open (Unit=13, File='D:\气象数据\tmin\test5.txt')

  Do i = 1, nn
    Do ii = 1, mm - 1

      dd( i,ii) = distance(lonx(i), laty(i), ilon(ii), ilat(ii))
! write (*, *) dd(i,ii)
    End Do
    Write (*, *) dd(i, ii)
!--------------------------------------------------------------------------
!输出B文件中最近点坐标
!--------------------------------------------------------------------------
    k = minloc(dd(i,1:ii), 1)
    If (ii/=k) Cycle
!Write (*,*) lonx(i), laty(i), ilon(ii), ilat(ii),kk(ii)
    Write (13, *) lonx(i), laty(i), ilon(ii), ilat(ii), dd(i, ii)

  End Do
  Deallocate (lonx, laty, ilon, ilat)
End Program hello

a文件有96232个坐标点，b有201801个点，我想把这两个文件的坐标点循环计算距离，然后把b中距离a中最近的坐标点（96232个）输出
现在第41行dd(II)，print结果是对的而第43行（do循环外面）lonx(i), laty(i)部分是对的，而 ilon(ii), ilat(ii)部分只接收到了do循环最后一次的结果，怎样才能把do所有结果都传到循环外面呢

fcode

修改见下面代码以 !// 为注释的内容

[Fortran] 纯文本查看 复制代码

Program hello
  Implicit None
  Integer , parameter :: NN = 96232 , MM = 201801
  Real :: distance, row_3, k, dd(MM)!//dd用一维数组即可
  Integer :: row_1, row_2, i, ii
  Real, Allocatable :: lonx(:), laty(:), ilon(:), ilat(:)
!--------------------------------------------------------------------------
!a文件坐标点
!--------------------------------------------------------------------------
  Allocate (lonx(nn), laty(nn))

  Open (Unit=11, File='D:\气象数据\tmin\pointmatch_all.txt')
  Do i = 1, nn
    Read (11, *) row_1, row_2, lonx(i), laty(i), row_3
  End Do
  Close (Unit=11)
!----------------------------------------------------------------------------
!b文件坐标点
!----------------------------------------------------------------------------
  Allocate (ilon(mm), ilat(mm))
  Open (Unit=12, File='D:\气象数据\tmin\test.txt')
  Do ii = 1, mm
    Read (12, *) ilon(ii), ilat(ii), row_3
  End Do
  Close (Unit=12)
!----------------------------------------------------------------------------
!两个循环用来计算距离
!----------------------------------------------------------------------------
 !Allocate (dd(mm))!放入坐标点距离
  Open (Unit=13, File='D:\气象数据\tmin\test5.txt')

  Do i = 1, nn
    Do ii = 1, mm !//不减1
      dd(ii) = distance(lonx(i), laty(i), ilon(ii), ilat(ii))
    End Do
    Write (*, *) dd(mm)
!--------------------------------------------------------------------------
!输出B文件中最近点坐标
!--------------------------------------------------------------------------
    k = minloc(dd(:), 1) !//去掉1:ii
    !// 去掉If (ii/=k) Cycle
    Write (13, *) lonx(i), laty(i), ilon(k), ilat(k), dd(k)
  End Do
  Deallocate (lonx, laty, ilon, ilat)
End Program hello

wxy

fcode 发表于 2017-9-21 16:51
修改见下面代码以 !// 为注释的内容

[mw_shl_code=fortran,true]Program hello

非常感谢