Compilare: user.cpp: In function ‘int main()’: user.cpp:18: warning: format ‘%lld’ expects type ‘long long int*’, but argument 3 has type ‘long int*’ user.cpp:31: warning: format ‘%lld’ expects type ‘long long int’, but argument 3 has type ‘long int’ user.cpp:18: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result