[C++] decltype(auto) C++ 11 feature

 1 //C++ 11 feature
 template <class T1, class T2>
 auto getMultiply(T1 data1, T2 data2) -> decltype(data1*data2)
 {
     return data1*data2;
 }
 int main()
 {
     //cout << getResult<int>(3,3,4,5) << endl;
     cout <<getMultiply(12.2, 13.3)<< endl;
     cout << typeid(getMultiply(12.2, 13.3)).name() << endl;
     system("pause");
 }

• auto : Deduce the type of data based on actual data
• auto is not allowed  to be used  as a function parameter