Comments by Humberto (Top 6 by date)

You are right, sir!
If am not wrong the OP wants to find all binary palindromes less then m. If so, a search for "how to find binary palindrome" can help.

Isn't this the same problem as finding all odd numbers less then m?

In the for loop you are comparing from right to left. To me it seems you must do the oposite.

Try this modification to the read statement:

if ( fread(asd,1,tamanho,f) != tamanho) {
free(asd);
fclose(f);
erro("Erro de leitura");
}

and see if it calls erro().