declare initialize vector inside struct/class

[marhuum]

how declare initialize vector inside struct/class

struct Data {
	int m=9;

	vector<int> mydata(m);
}

gcc comes with

 error: ‘m’ is not a type
    |  vector<int> mydata(m);

and

struct Data {
	vector<int> mydata(m);
}

gcc comes with

error: expected identifier before numeric constant
   25 |  vector<int> mydata(9);

[jlb]

So what exactly is a mydata()?

[keskiverto]

Sounds like the mydata is a member variable and that you want it to have 9 elements.

struct Data {
  vector<int> mydata;

  Data() : mydata(9) {} // default constructor
  Data(int m) : mydata(m) {} // custom constructor
};