#include "node.h"
#include <stdio.h>
extern int yyparse();
extern pNode root;
extern void yyrestart(FILE *);
extern int errors;

int main(int argc, char **argv) {
  if (argc > 1) {
    FILE *f = fopen(argv[1], "r");
    if (!f) {
      perror(argv[1]);
      return 1;
    }
    yyrestart(f);
  }
  int running_res = 0;
  do {
    running_res = 0;
    running_res = yyparse();
  } while (running_res);
  if (!errors) {
    DFS(root, 0);
  }
  return 0;
}