Compilare: user.cpp:41:2: warning: no newline at end of file user.cpp: In function 'int main()': user.cpp:17: warning: comparison between signed and unsigned integer expressions user.cpp:21: warning: comparison between signed and unsigned integer expressions user.cpp:22: warning: comparison between signed and unsigned integer expressions user.cpp:34: warning: comparison between signed and unsigned integer expressions /tmp/ccOjKolG.o: In function `main': user.cpp:(.text+0x72): warning: the `gets' function is dangerous and should not be used.