Compilare: user.cpp: In function ‘int main()’: user.cpp:80: warning: use of ‘ll’ length modifier with ‘f’ type character user.cpp:68: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:74: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result