|  | ! Copyright 2020-2025 Free Software Foundation, Inc. | 
|  | ! | 
|  | ! This program is free software; you can redistribute it and/or modify | 
|  | ! it under the terms of the GNU General Public License as published by | 
|  | ! the Free Software Foundation; either version 3 of the License, or | 
|  | ! (at your option) any later version. | 
|  | ! | 
|  | ! This program is distributed in the hope that it will be useful, | 
|  | ! but WITHOUT ANY WARRANTY; without even the implied warranty of | 
|  | ! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the | 
|  | ! GNU General Public License for more details. | 
|  | ! | 
|  | ! You should have received a copy of the GNU General Public License | 
|  | ! along with this program.  If not, see <http://www.gnu.org/licenses/>. | 
|  |  | 
|  | program main | 
|  | implicit none | 
|  |  | 
|  | interface | 
|  | integer function some_func (arg) | 
|  | integer :: arg | 
|  | end function some_func | 
|  |  | 
|  | integer function string_func (str) | 
|  | character(len=*) :: str | 
|  | end function string_func | 
|  | end interface | 
|  |  | 
|  | integer :: val | 
|  |  | 
|  | val = some_func (1) | 
|  | print *, val | 
|  | val = string_func ('hello') | 
|  | print *, val | 
|  | end program main |