Compilare: user.cpp:69:2: warning: no newline at end of file user.cpp: In function 'int main()': user.cpp:52: warning: format '%ld' expects type 'long int', but argument 2 has type 'size_t' user.cpp:53: warning: comparison between signed and unsigned integer expressions user.cpp:62: warning: format '%ld' expects type 'long int', but argument 2 has type 'size_t' user.cpp:63: warning: comparison between signed and unsigned integer expressions