In the description, we are asked to have an array of Point3D storing 7 elements. I'm kind of confused. What is the purpose to have an array and what exactly are these 7 elements?

You can have a static array of Struts.  No pointers are necessary.  The assignment is to create the struct with the necessary member variables.  Then you are to create an array of 7 instances of the struct type and randomly populate each point with an x, y, and z value in the given range.

Then you test your points with the translate() and reflect() functions that you also need to add.

Yes, each point should be displayed when you are showing the output.

kevinmowers@yahoo.com wrote:

Can anyone explain how translate works? does the user input an integer and x, y, and z is moved by that integer? I don't get x' = x + tx

tx, ty, tz are the translation values for each coordinate.  You ask the user for tx, ty, and tz and you update the coordinates accordingly.  Translation is how you move a point from one location to another.  x' = x + tx means x' is the updated value for x after taking the original value and adding the translation value.  NOTE: tx, ty, and tz can be any integer positive or negative.