Triangle-Tools/programs/procedural.tri

! test program proc.<EFBFBD>
let
   const size   ~ 6;
   type  String ~ array 6 of Char;

  proc putstr (s: String) ~
    let var i: Integer
    in
      begin
      i := 0;
      while i < size do
        begin put (s[i]); i := i+1 end
      end;

   proc apply (proc p (var c : Char), var s : String) ~
      let
         var i : Integer
      in
         begin
         i := 0;
         while i < size do
            begin
            p (var s[i]);
            i := i+1
            end
         end; !apply

   proc shift (var l : Char) ~
      let const ordl ~ ord (l)
      in
         if (ord('a') <= ordl)
            /\ (ordl <= ord('z')) then
            l := chr (ordl - ord('a') + ord('A'))
         else
            ; !skip

   proc replaceall (old: Char, new: Char,
                    var s: String) ~
      let
         proc zap (var c: Char) ~
            if c = old then c := new else !skip
      in
         apply (proc zap, var s);

   var name : String

in
   begin
   apply (proc get, var name);
   geteol ();
   putstr (name); puteol ();
   apply (proc shift, var name);
   putstr (name); puteol ();
   replaceall ('I', 'i', var name);
   putstr (name); puteol ()
   end