How to define a vector in C-CodePudding

I was just wondering, if I am setting up a vector to be a prototype of a function how do I define this? I know that I have the option of using dynamic memory allocation, but I was wondering if instead I could just use:

void Function(double vector[]) { }

and in the main bit of code, allocate it some entries?

Is this an acceptable method?

CodePudding user response：

Firstly, you should not use vector as it is part of the standard library (std::vector).

If the vector you describe has always the same dimension, you can create a structure:

struct Vector3D
{
  double x = 0.0;
  double y = 0.0;
  double z = 0.0;
};

And then use it in your function and main:

void Function(Vector3D v) { }

int main()
{
  Vector3D v = {1.0, 0.0, 0.0}; // Unit X
  Function(v);

  return 0;
}

CodePudding user response：

Do this

template<class T>
void Function(std::vector<T>& vector)
{
    // do your thing
}

For arrays you can also do

template<int N>
void Function(std::array& array)
{
    // do your thing
}