Compilare: user.cpp:54:5: warning: no newline at end of file user.cpp: In function 'int main()': user.cpp:23: warning: format '%d' expects type 'int*', but argument 2 has type 'long unsigned int*' user.cpp:26: warning: comparison between signed and unsigned integer expressions user.cpp:52: warning: format '%d' expects type 'int', but argument 2 has type 'long unsigned int'