Compilare: user.cpp:13:1: warning: ‘typedef’ was ignored in this declaration [enabled by default] }; ^ user.cpp: In function ‘int main()’: user.cpp:59:6: warning: unused variable ‘a’ [-Wunused-variable] int a, b, c; ^ user.cpp:59:9: warning: unused variable ‘b’ [-Wunused-variable] int a, b, c; ^ user.cpp:59:12: warning: unused variable ‘c’ [-Wunused-variable] int a, b, c; ^