Error C4716: 'operator<<': must return a value [closed]

Answer 1

Your function is missing its return. The << operator should return a reference to the stream that it was using so that you can chain operations together like

cout << foo << bar << foobar;

To fix your function you just need to return the ostream that you are using in your function

inline friend std::ostream& operator << ( std::ostream& os, const sc_float &v)
{
    //...
    os << temp;
    return os;// <-- this returns the stream that we are unsing so it can be used by other functions
}