/media/sda-magnetic/david/Dokumente-15/fernuni-hagen/cs-i-ii/fsm/fsm/lex-yacc-bash-etc/yacc09.cc

%{
#include <ctype.h>
#include <stdio.h>
%}
%token NUMBER
%%
lines               :   lines expr '\n'         {printf("%d\n", $2);}
                    |   lines '\n'
                    ;
expr                :   expr '+' term           {$$ = $1 + $3;}
                    |   expr '-' term           {$$ = $1 - $3;}
                    |   term
                    ;
term                :   term '*' factor         {$$ = $1 * $3;}
                    |   term '/' factor         {$$ = $1 / $3;}
                    |   factor
                    ;
factor              :   '(' expr ')'            {$$ = $2;}
                    |   NUMBER
                    ;