Question

I’m working on an OpenGL/C++ program where I need to store coordinates as and when I plot them in my window. But since the number of points plotted is undefined, I cant fix up the size of the array. Is it possible to dynamically allocate space to an array? Can I use any other data structures to accomplish the same?

Answer 1

Yes, use a std::vector instead.

Combined with push_back you can dynamically increase the number of elements.

std::vector<Coordinate> coordinates;
coordinates.push_back(Coordinate(0,0));
coordinates.push_back(Coordinate(1,1));

You can access the elements same as you would with an array:

coordinates[0], coordinates[1]...