FPUTC — Write a single character in stream mode#

FPUTC(UNIT, C)#

Write a single character in stream mode by bypassing normal formatted output. Stream I/O should not be mixed with normal record-oriented (formatted or unformatted) I/O on the same unit; the results are unpredictable.

Parameters:

UNIT – The type shall be INTEGER.
C – The type shall be CHARACTER and of default kind.
STATUS – (Optional) status flag of type INTEGER. Returns 0 on success, -1 on end-of-file and a system specific positive error code otherwise.

Standard:

GNU extension

Class:

Subroutine, function

Syntax:

CALL FPUTC(UNIT, C [, STATUS])
STATUS = FPUTC(UNIT, C)

Example:

PROGRAM test_fputc
  CHARACTER(len=10) :: str = "gfortran"
  INTEGER :: fd = 42, i

  OPEN(UNIT = fd, FILE = "out", ACTION = "WRITE", STATUS="NEW")
  DO i = 1, len_trim(str)
    CALL fputc(fd, str(i:i))
  END DO
  CLOSE(fd)
END PROGRAM