Compilare: user.cpp: In function ‘int main()’: user.cpp:11: warning: use of ‘ll’ length modifier with ‘f’ type character user.cpp:11: warning: use of ‘ll’ length modifier with ‘f’ type character user.cpp:13: warning: use of ‘ll’ length modifier with ‘f’ type character user.cpp:13: warning: use of ‘ll’ length modifier with ‘f’ type character user.cpp:10: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result