Compilare: user.cpp: In function ‘int main()’: user.cpp:26: warning: statement has no effect user.cpp:27: warning: name lookup of ‘i’ changed user.cpp:22: warning: matches this ‘i’ under ISO standard rules user.cpp:26: warning: matches this ‘i’ under old rules user.cpp:52: warning: statement has no effect user.cpp:53: warning: name lookup of ‘i’ changed user.cpp:48: warning: matches this ‘i’ under ISO standard rules user.cpp:52: warning: matches this ‘i’ under old rules