Triangle tools from the text book Programming Processors in Java.
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Triangle-Tools/programs/procedural.tri

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! test program proc.Æ
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