Inputting a user-specified number of points and manipulating a specific one

[TeiRaven]

I'm terribly sorry for the long and probably unhelpful title, but I really can't think of a better way to put it.

I have a problem here, and I think I know how to do it, except for what I've put in bold:

Your program will prompt a user for a set of points [as in, on a Cartesean plane], first asking how many points will be in the set, then reading in the points. The program then offers the user the following menu until the user exits:

A) enter a new set of points [will restart from the begining]
B) move a particular point along the x axis, y axis, or x and y axis
C) mirror a particular point along the x axis, y axis, or x and y axis
D) output all of the points in their current state
E) exit

That is, I know how to read in a set number of points and manipulate a single one, but I don't know how to do it with a user-specified (and thus unknown) number of points.

I don't know if this will be helpful or just extra information, but:
-all points will be integers
-I must use a class, Point

Once I know where to start with manipulating a specific point, I think the rest will be manageable.

Thanks much!
Tei

[Volatile Pulse]

first asking how many points will be in the set, then reading in the points.

Sample code:

cout << "How many points would you like to enter? ";
cin >> numPoints;

for (int i = 0; i < numPoints; i ++)
   cin >> myArrayOfPoints[i].X >> myArrayOfPoints[i].Y;

move a particular point along the x axis, y axis, or x and y axis

Sample code:

cout >> "Please choose a point to move: "

for (int i = 0; i < numPoints; i ++)
   cout << i + 1 << ") " << myArrayOfPoints[i].X << " " << myArrayOfPoints[i].Y << "\n";

cin >> pointToMove;

cout << "Please enter the new X and Y coords: ";
cin >> toX >> toY;

myArrayOfPoints[i - 1].Move(toX, toY);

I'm sure you should be able to work out how to implement those pieces into your code.

[TeiRaven]

Arrays! That never even crossed my mind!

Thank you so very much!

[Volatile Pulse]

Another option is to use vectors (pun intended) if you need to have dynamically sized arrays.

[TeiRaven]

Well, we haven't done vectors in class, so I think I'll stick to the arrays--that's something we've done.

...I missed the pun...I don't think I know enough for programming humor to make sense to me just yet ^^;

[Volatile Pulse]

Points are a geometry term, as is vectors...

[TeiRaven]

You know, I didn't do much better in geometry than I'm doing in C++ ;)