Question

I define the following struct

struct CCPtDist
{
  double[] wDist = new double[8];
};

And I want to build a “CCPtDist” variable called tmpPtDist and want to assign a double number to wDist:

CCPtDist tmpPtDist;
tmpPtDist.wDist[0] = 233.7;

But the g++ compiler returns an error: ‘struct CCPtDist’ has no member named ‘wDist’?

Answer 1

There are a number of things wrong in the code. First off, if you declare an array as a member, the memory is allocated inline as part of the struct. You can’t just assign an arbitrary pointer to it. Second off, I don’t think you declared the array correctly anyway. Third, you need to put complex initialization like that in a constructor.
I’m surprised it doesn’t give you a compile error on the double[] wDist = new double[8];
line.

Try changing it to something like this

struct CCPtDist
{
    double* wDist;

    CCPtDist(): wDist(new double[8]) {}
};