Representation of the gps point

I have a set of GPS points with following recor开发者_如何转开发ds:

point_label    lat       lon      H
FraEur3        N35.3575  E12.4617 207.39

I am thinking about suitable data representation for point label.

What is better:

class GPSPoint
{
   char * label;
   double lat, lon, h;
};

or

class GPSPoint
{
   char label[255];
   double lat, lon, h;
};

The first option has less memory consumption, but I have to write copy constructor, operator= and destructor etc.

The second option is easier to code but has a greater memory consumption.

Which option do you recommend? I do not want use std::string...

---

class GPSPoint
{
   vector<char> label;
   double lat, lon, h;
}

It is not string and dynamically allocable.

---

Well, std::string is the solution and I can't imagine why you'd want to avoid it.

To be honest, though, I wouldn't have a label in there at all. Let your point class just contain co-ordinates; you can handle labelling outside of that logic.

---

In the first case, you'll need to allocate memory elsewhere for the string contents. There is absolutely no reason to prefer this to std::string.

You should be able to find documentation on the maximum length of the string to reduce the size of your fixed char array.

I sure hope you have a good reason for dismissing std::string out of hand.