Compilare: user.cpp: In function 'int main()': user.cpp:23: warning: format '%d' expects type 'int', but argument 3 has type 'long int' user.cpp:4: warning: unused variable 'k' user.cpp:4: warning: unused variable 'r' user.cpp:4: warning: unused variable 'nrdiv' user.cpp:6: warning: unused variable 'f' user.cpp:21: warning: 'n' is used uninitialized in this function