Compilare: user.cpp:16:2: warning: no newline at end of file user.cpp: In function 'int main()': user.cpp:5: warning: format '%d' expects type 'int*', but argument 2 has type 'long unsigned int*' user.cpp:6: warning: format '%d' expects type 'int*', but argument 2 has type 'long unsigned int*' user.cpp:14: warning: format '%d' expects type 'int', but argument 2 has type 'long unsigned int' user.cpp:4: warning: 'r' may be used uninitialized in this function