Compilare: user.cpp: In function ‘int main()’: user.cpp:30:5: warning: ‘fr’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (fr>0) ^ user.cpp:38:16: warning: ‘c’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<c<<" "<<fr; ^