/media/sda-magnetic/david/Dokumente-15/fernuni-hagen/cs-i-ii/old-cs-2-01/informatik2/bash-programming/lex-yacc-bash-etc/yacc25.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
                ;