$ sudo install flex
$ flex file.l && gcc lex.yy.c -o exec && ./exec
$ flex file.l && gcc lex.yy.c -o exec && ./exec input.txt > output.txt
$ sudo install yacc
$ yacc -d file.y && gcc y.tab.c -o exec && ./exec
$ flex file.l && yacc -d file.y && gcc y.tab.c -o exec && ./exec
%option noyywrap
%{
#include <stdio.h>
#include <string.h>
#include "y.tab.h"
%}
routerconfig "config-router"
network "network"
hashtag "#"
area "area"
parouv "("
parferm ")"
point "."
nb [2][0-5][0-9]|[1][0-9][0-9]|[1-9][0-9]|[0-9]
id [a-zA-Z]([a-zA-Z]|[0-9])*
%%
{routerconfig} {return CONFIGROUTER;}
{hashtag} {return HASHTAG;}
{parouv} {return PAROUV;}
{parferm} {return PARFERM;}
{area} {return AREA; }
{network} {return NETWORK;}
{id} {return ID;}
{nb} {return NB;}
{point} {return POINT;}
[$] {return FIN;}
[\t \n]
%%
$ flex file.l
%{
#include<stdio.h>
int yylex(void);
int yyerror(char*s);
%}
%token HASHTAG
%token ID
%token FIN
%token PAROUV
%token PARFERM
%token CONFIGROUTER
%token NETWORK
%token NB
%token AREA
%token POINT
%%
S: CMD FIN {printf("commande correcte !");}
;
CMD: ID PAROUV CONFIGROUTER PARFERM HASHTAG NETWORK ADR ADR AREA NB ;
ADR: NB POINT NB POINT NB POINT NB;
%%
#include "lex.yy.c"
int yyerror(char *s){
printf("%s \n",s);
return 0;
}
int main(){
yyparse();
return 0;
}
$ yacc -d file.y && gcc y.tab.c -o exec && ./exec
Exemple d'execution
> isiAriana ( config-router ) # network 255.255.255.0 255.0.0.0 area 2$
> commande reseau correcte !