%{
#include <iostream>
#include <cstdlib>
#include <string>
#include <cmath>
  using namespace std;
 
  extern int yylex();
  
  void yyerror(string s) {
    cerr << s << endl;
    exit(EXIT_FAILURE);
  }
 
%}

%token value_token sin_token cos_token
%token <d> num_token

%type <d> E

%union {
  double d;
}

%left '+' '-'
%left '*' '/'

%%
Program: Program Naredba
| Naredba
;
Naredba: value_token '"' E '"' '\n' {
  cout << $3 << endl;
 }
;
E : E '+' E {
  $$ = $1 + $3;
 }
| E '-' E {
  $$ = $1 - $3;
 }
| E '*' E {
  $$ = $1 * $3;
 }
| E '/' E {
  $$ = $1 / $3;
 }
| '(' E ')' {
  $$ = $2;
 }
| sin_token '(' E ')' {
  $$ = sin($3);
 }
| cos_token '(' E ')' {
  $$ = cos($3);
 }
| num_token {
  $$ = $1;
 }
;
%%
int main() {
  yyparse();
  return 0;
}