Compilare: user.cpp: In function ‘int main()’: user.cpp:87:9: warning: unused variable ‘pos’ [-Wunused-variable] int i, pos, x; ^ user.cpp:87:14: warning: unused variable ‘x’ [-Wunused-variable] int i, pos, x; ^ user.cpp:79:50: 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:80:52: 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); ^