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program eightqueen1;
var i : integer;
   q : boolean;
   a : array[ 1 .. 8] of boolean;
   b : array[ 2 .. 16] of boolean;
   c : array[ -7 .. 7] of boolean;
   d : array[ 1 .. 8] of integer;
 
 
procedure try( i : integer; var q : boolean); var j : integer; begin j := 0;
 repeat j := j + 1; q := false;
   if a[ j] and b[ i + j] and c[ i - j] then
   begin x[ i] := j;
     a[ j] := false; b[ i + j] := false; c[ i - j] := false;
     if i < 8 then
     begin try( i + 1, q);
       if not q then
       begin a[ j] := true; b[ i + j] := true; c[ i - j] := true;
       end
     end else q := true
   end
 until q or (j = 8);
 
end; begin for i := 1 to 8 do a[ i] := true; for i := 1 to 8 do b[ i] := true; for i := -7 to 7 do c[ i] := true; try( 1, q); if q then
 for i := 1 to 8 do write( x[ i]:4);
writeln end.

prog.pas: In procedure `try':
prog.pas:13: error: undeclared identifier `x' (first use in this routine)
prog.pas:13: error:  (Each undeclared identifier is reported only once
prog.pas:13: error:  for each routine it appears in.)
prog.pas: In main program:
prog.pas:25: error: undeclared identifier `x' (first use in this routine)

Standard output is empty