Compilare: user.cpp:6:29: warning: multi-character character constant user.cpp:6: warning: overflow in implicit constant conversion user.cpp: In function 'int main()': user.cpp:22: warning: comparison between signed and unsigned integer expressions /tmp/ccWFWl6M.o: In function `main': user.cpp:(.text+0x89): warning: the `gets' function is dangerous and should not be used.