Compilare: user.cpp: In function 'int main()': user.cpp:14: warning: format '%ld' expects type 'long int*', but argument 2 has type 'unsigned int*' user.cpp:14: warning: format '%ld' expects type 'long int*', but argument 3 has type 'unsigned int*' user.cpp:14: warning: format '%ld' expects type 'long int*', but argument 4 has type 'unsigned int*' user.cpp:16: warning: comparison between signed and unsigned integer expressions