Compilare: user.cpp: In function ‘int main()’: user.cpp:42:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < vt.size(); ++i) { ^ user.cpp:53:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < dec.size() / 2; ++k) { ^ user.cpp:18:26: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(str, fsize, 1, f); ^