如何将输出写入 Fortran 中的字符串？

Question

我需要将格式化输出写入字符串 DTSTR。它过去可以在layhe fortran下工作，但不能在gfortran

   INTEGER*2    MON,DAY,YEAR,HR,MINUTE,SEC,HUND
   CHARACTER    DY*2
   CHARACTER    DTSTR*24
   COMMON   /RD/ DTSTR
   ...
   ...
   WRITE(DTSTR,10)MON,DAY,YEAR,HR,MINUTE,DY,' ]'
  10 FORMAT('[ ',I2,'-',I2.2,'-',I4,2X,I2,':',I2.2,1X,2A2)

下工作，它只是一个空行。如果我使用正确的输出。但我想存储这个字符串。是否可以使用 gnu fortran 来做到这一点？

   WRITE(*,10)MON,DAY,YEAR,HR,MINUTE,DY,' ]'

更新

我正在尝试编译以下文件。我认为问题可能出在 COMMON 上。

      PROGRAM HELO

      CALL DOTIME

      WRITE(*,5700)DTSTR

 5700 FORMAT(24X,A24/)

      END


      SUBROUTINE DOTIME
C
      IMPLICIT NONE
      INTEGER*2    MON,DAY,YEAR,HR,MINUTE,SEC,HUND
      CHARACTER    DY*2
      CHARACTER    DTSTR*24
      COMMON   /RD/ DTSTR

      integer values(8)
      call date_and_time(VALUES=values)

        YEAR   = values(1)
        MON    = values(2)
        DAY    = values(3)
        HR     = values(5)
        MINUTE = values(6)
        SEC    = values(7)
        HUND   = values(8)
C     =================================================
C
C     Incompitable function => CALL GETDAT(YEAR,MON,DAY)
C     Incompitable function => GETTIM(HR,MINUTE,SEC,HUND)
      IF(HR .GE. 12)THEN
           IF(HR .NE. 12)HR=HR-12
           DY='PM'
      ELSE
           DY='AM'
      ENDIF
      WRITE(DTSTR,10)MON,DAY,YEAR,HR,MINUTE,DY,' ]'
   10 FORMAT('[ ',I2,'-',I2.2,'-',I4,2X,I2,':',I2.2,1X,2A2)
      RETURN
      END

Answer 1

唔？它对我来说效果很好：

program testwrite
    implicit none
    INTEGER :: MON,DAY,YEAR,HR,MINUTE,SEC,HUND
    CHARACTER(LEN=2)  :: DY
    CHARACTER(LEN=24) :: DTSTR

    MON = 4
    DAY = 27
    YEAR= 2010
    HR  = 13
    MINUTE = 27
    SEC  = 0
    HUND = 0
    DY   ='WE'

    WRITE(DTSTR,10)MON,DAY,YEAR,HR,MINUTE,DY,' ]'
 10 FORMAT('[ ',I2,'-',I2.2,'-',I4,2X,I2,':',I2.2,1X,2A2)

    print *,'<',trim(DTSTR),'>'

end program testwrite

正如人们所期望的那样

 <[  4-27-2010  13:27 WE ]>

。可以与我使用过的几个版本的 gfortran 配合使用。

更新：是的，问题出在您的公共块中。公共块未在主程序中声明。但实际上，将字符串作为参数传递是更简单、更好的做法：

      PROGRAM HELO
      IMPLICIT NONE
      CHARACTER(LEN=24) :: DTSTR

      CALL DOTIME(DTSTR)

      WRITE(*,5700)DTSTR

 5700 FORMAT(24X,A24/)

      END


      SUBROUTINE DOTIME(DTSTR)
C
      IMPLICIT NONE
      INTEGER*2    MON,DAY,YEAR,HR,MINUTE,SEC,HUND
      CHARACTER    DY*2
      CHARACTER(LEN=24), INTENT(OUT) ::   DTSTR