6.3.1.2.1 Messages and Error Messages

To write messages in the Scilab main window, user must call the out Fortran routine or cout C procedure with the character string of the desired message as input argument.

To return an error flag of an interfaced routine user must call the erro Fortran routine or cerro C procedure with the character string of the desired message as input argument. This call will produce the edition of the message in the Scilab main window and the error exit of Scilab associated function.

Input and output

To open files in Fortran, it is highly recommended to use the Scilabroutine clunit. If the interfaced routine uses the Fortran open instruction, logical units must in any case be greater than 40.

      call clunit( lunit, file, mode)

with:

• file the file name character string
• mode a two integer vector defining the opening mode mode(2) defines the record length for a direct access file if positive. mode(1) is an integer formed with three digits f, a and s
  • f defines if file is formatted (0) or not (1)
  • a defines if file has sequential (0) or direct access (1)
  • s defines if file status must be new (0), old ( 1), scratch (2) or unknown (3)

Files opened by a call to clunit must be close by

      call clunit( -lunit, file, mode)

In this case the file and mode arguments are not referenced.