Compilare: user.cpp: In function ‘int main()’: user.cpp:82:18: warning: unused variable ‘aux’ [-Wunused-variable] LL i, psum = 0, aux; ^ user.cpp:74:50: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen((fileInput + ".in").c_str(), "r", stdin); ^ user.cpp:75:52: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen((fileInput + ".out").c_str(), "w", stdout); ^