/media/sda-magnetic/david/Dokumente-15/fernuni-hagen/cs-i-ii/old-cs-2-01/informatik2/bash-programming/lex-yacc-bash-etc/yacc20.cc

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