Compilare: user.cpp: In function 'int main()': user.cpp:22: warning: format '%d' expects type 'int*', but argument 2 has type 'long int*' user.cpp:43: warning: format '%d' expects type 'int*', but argument 2 has type 'long int*' /tmp/ccOK2rj1.o: In function `main': user.cpp:(.text+0x6a): warning: the `gets' function is dangerous and should not be used.