Compilare: user.cpp: In function ‘int main()’: user.cpp:17: warning: format ‘%lld’ expects type ‘long long int*’, but argument 3 has type ‘int*’ user.cpp:38: warning: operation on ‘i’ may be undefined user.cpp:15: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:17: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result