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Program Example38;
{ Program to demonstrate the AssignStream function. }
Uses oldlinux;
Var Si,So : Text;
S : String;
i : longint;
begin
if not (paramstr(1)='-son') then
begin
Writeln ('Calling son');
Assignstream (Si,So,'./ex38 -son');
if linuxerror<>0 then
begin
writeln ('AssignStream failed !');
halt(1);
end;
Writeln ('Speaking to son');
For i:=1 to 10 do
begin
writeln (so,'Hello son !');
if ioresult<>0 then writeln ('Can''t speak to son...');
end;
For i:=1 to 3 do writeln (so,'Hello chap !');
close (so);
while not eof(si) do
begin
readln (si,s);
writeln ('Father: Son said : ',S);
end;
Writeln ('Stopped conversation');
Close (Si);
Writeln ('Put down phone');
end
Else
begin
Writeln ('This is the son ');
While not eof (input) do
begin
readln (s);
if pos ('Hello son !',S)<>0 then
Writeln ('Hello Dad !')
else
writeln ('Who are you ?');
end;
close (output);
end
end.
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