Compilare: user.cpp: In function ‘int main()’: user.cpp:32:9: warning: unused variable ‘nr2’ [-Wunused-variable] int nr2 = 0 ; ^ user.cpp:41:9: warning: unused variable ‘ok’ [-Wunused-variable] int ok = 0; ^ /tmp/ccl9jVmw.o: In function `main': user.cpp:(.text.startup+0x52): warning: the `gets' function is dangerous and should not be used.