XMesaCmplr25 : PROGRAM = {
UpperCase: PROC = {
c: CHARACTER ← 'a;
c ← c + ('A - 'a);
};
AppendChar: PROC [s: STRING, c: CHARACTER] = {};
s: STRINGNIL;
exp: INTEGER ← 2;
AppendChar[s, '0 + (exp/10)];
}.