Compilare: user.cpp: In function ‘int main()’: user.cpp:186:21: warning: variable ‘p’ set but not used [-Wunused-but-set-variable] for (int t = 1, p = -1; q >= 1; t += n, q -= n, p = -1) { ^ user.cpp: In member function ‘char InParser::read_ch()’: user.cpp:14:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 4096, fin); ^