Compilare: user.cpp:41:2: warning: no newline at end of file user.cpp: In function 'int main()': user.cpp:12: warning: format '%s' expects type 'char*', but argument 2 has type 'char (*)[16]' user.cpp:13: warning: comparison between signed and unsigned integer expressions user.cpp:14: warning: comparison between signed and unsigned integer expressions user.cpp:33: warning: comparison between signed and unsigned integer expressions