%{
class calcparser {
%}

%token INT
%token FLOAT
%token OPEN
%token CLOSE
%token ADD
%token SUBTRACT
%token MULTIPLY
%token DIVIDE

%%
S : Number {}
Number : INT | FLOAT {}
S : Number Operator S {}
S : OPEN S CLOSE | OPEN S CLOSE Operator S {}
Operator : ADD | SUBTRACT | MULTIPLY | DIVIDE {}
%%
}