Compilare: user.cpp:51: warning: integer constant is too large for ‘long’ type user.cpp: In function ‘int main()’: user.cpp:51: warning: overflow in implicit constant conversion user.cpp:51: warning: format ‘%lld’ expects type ‘long long int’, but argument 3 has type ‘int’ user.cpp:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result