Listele cu numere pare

%{
// Afisati doar listele care contin numere pare
#include <stdio.h>
%}

nrpar ([1-9][0-9]*)?[02468]
literal ({nrpar},)+
lista \<{literal}{1,}{nrpar}\>


%%
\<{lista}\> {ECHO;}
.|\n
%%

int main(int argc, char** argv){
    if(argc > 0)
        yyin = fopen(argv[1],"r");
    yylex();
}



/////////// fisier cu date
<1,2,3,4>
<2,4,6>
<20, 22, 12, 2, 1112>
<11, 12> <10> <01>
<100> <101> <102> <112> <124> <120>
<1111> <1234> <1220> <10001>

(1,2,3,4)
(2,4,6)
(20, 22, 12, 2, 1112)
(11, 12) (10) (01)
(1000) (101) (102) (112) (124) (120)
(1111) (1234) (1220) (10001)