standard input in c++ to read 2D coordinates

[tonnyspain]

Hi,

I am new to c++ programming.Could anyone tell me how I can use
standard input in c++ to read 2D coordinates? e.g., read n elements
which have x-coordinates and y-coordinates.

Could anyone show me a simple example? Thanks very much.

---Tonny

[Ganon11]

It depends on how you want this done.

Do you want 2 int variables (xCoordinate, yCoordinate) to hold the values?

Do you want a 2D array with size N X 2 (where N is how many points you need), where the array[i][0] value is your X coordinate and the array[i][1] value is your Y coordinate?

Do you want to define a struct to hold two ints and manipulate these?

Do you want to define a class that will again hold two ints, but also provide some other functionalities?

[tonnyspain]

Hi, thanks for reply.

I want to define a structure to hold n points in a graph, e.g. compute the distance between any two points in a graph.

Any help will be greatly appreciated.

[Ganon11]

OK, I would start by creating a Point class. The Point class has two int variables for its X and Y coordinates. It should have a constructor that allows it to accept initial values, or provide default values, for the coordinates. It could have a computeDistance(Point& other) function to compute the distance (using the Pythagorean Theorem), as well as an overloaded == operator, maybe even overload the << operator so you can easily and nicely output your points.