/media/sda-magnetic/david/Dokumente-15/fernuni-hagen/cs-i-ii/old-cs-2-03/bash-programming/lex-yacc-bash-etc/yacc-bsp-00002.txt

%{
#include <ctype.h>
#include <stdio.h>
%}
%token NUMBER
%%
lines       : lines expr '\n'
            | line '\n'
            | '\n'
            ;
expr        : expr '+' term
            | expr '-' term
            | term
            ;
term        : term '*' factor
            | term '\' factor
            | factor
            ;
factor      : '(' expr ')'
            | NUMBER
            |