%{ #include int n = 1; %} %% S : '{' S '}' {printf("niveau d'accolades: %d \n", n++);} | ; %% int main(){ yyparse(); } int yylex() { int ch; while ((ch = getchar()) == '\n'); return ch; } yyerror(char *s) { fprintf(stderr, "%s\n", s); }