Compilare: user.cpp: In function 'int main()': user.cpp:29: warning: comparison between signed and unsigned integer expressions user.cpp:32: warning: comparison between signed and unsigned integer expressions user.cpp:34: warning: comparison between signed and unsigned integer expressions user.cpp:44: warning: format '%ld' expects type 'long int', but argument 2 has type 'int' /tmp/cciTsM9D.o: In function `main': user.cpp:(.text+0xc6): warning: the `gets' function is dangerous and should not be used.