How to determine if a string is a number with C++?

Question

I\'ve had quite a bit of trouble trying to write a function that checks if a string is a number. For a game I am writing I just need to check if a line from the file I am r

Answer 1

We may use a stringstream class.

    bool isNumeric(string str)
    {
       stringstream stream;                   
       double number;

       stream<>number;

       return stream.eof();
    }