Compilare: user.cpp:21: warning: integer constant is too large for ‘long’ type user.cpp:29: warning: integer constant is too large for ‘long’ type user.cpp: In function ‘int main()’: user.cpp:78: warning: comparison between signed and unsigned integer expressions user.cpp:80: warning: comparison between signed and unsigned integer expressions user.cpp:82: warning: comparison between signed and unsigned integer expressions user.cpp:52: warning: unused variable ‘j’