Question

I’ve got a class:

someclass header code:

class SomeClass{
    SomeClass();
    vector<int> somePointerVector;

    public:
    SomeClass(vector<int> &someVector);
};

Im a little confused about how to use vectors here. I’d like to set somePointerVector = someVector, so that I can manipulate the data in someVector with other parts of the class using somePointerVector and I also don’t want to copy all of someVectors data.

With an array I’d do it with:

int* somePointerArray = someArray;

But how would I do this with vectors?

Answer 1

Make somePointerVector a reference and put it in the initialization list of your class. (And please give it a better name.)

class SomeClass
{
    vector<int> &somePointerVector;

  public:
    SomeClass(vector<int> &someVector)
      : somePointerVector(someVector)
    {}
};