Compilare: user.cpp: In function ‘int one(int, std::vector<int>)’: user.cpp:65:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int two(int, std::vector<int>)’: user.cpp:109:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int fibo(int)’: user.cpp:25:12: warning: ‘f3’ may be used uninitialized in this function [-Wmaybe-uninitialized] return f3; ^ user.cpp: In function ‘int main()’: user.cpp:124:27: warning: ‘f3’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(q==1) cout<<fibo(n); ^