/media/sda-magnetic/david/Dok-15-2023-11-27/fernuni-hagen/cs-i-ii/old-cs-2-01/informatik2/lex-yacc-bash-etc/yacc27.cc

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