Yet another question on system calls(newbie question)

["Torbjörn Karfunkel" <toka@prover.com>]

Using the pragma Import method of calling non-Ada entities, am I only
allowed to define functions? How about procedures? What I want to do is
to create a text file, give this text file as a parameter to a C
program, and then wait until the C program finishes. By then it will
have produced another text file that I want to use.
Can I use a dummy result variable like the 'result' in the following
(from another mail):

procedure Command is

   function C_System(value : String) return integer;
   pragma Import(
         C, C_System, "system");

   result : integer;
begin
   result := C_System("pwd ");
   result := C_System(value => "acdsee D:\work\pictures\BP47.jpg ");
end Command;

/Torbj�rn Karfunkel