Compilare: user.cpp: In function ‘int main()’: user.cpp:201: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:202: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:206: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:207: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result