Anyone know what I have to fill in for function getData() in my program? AdobeAnimate3.0 C++

This is the coding I made. But its missing something in order for the program to work, other wise the lblOutput will just give me N/A when calculating Velocity. Theres a function writtin below, and I have to get data somehow. Would anyone know what I have to fill in?

// Name:

// Date:

// Purpose: To calculate the velocity of an object

// This line makes the button, btnDisplay wait for a mouse click

// When the button is clicked, the displayVelocity function is called

btnDisplay.addEventListener(MouseEvent.CLICK, displayVelocity);

// These lines make the textinputs wait for a mouse click

// When any of these components are clicked, the clearLabels function is called

txtinDistance.addEventListener(MouseEvent.CLICK, clearLabels);

txtinTime.addEventListener(MouseEvent.CLICK, clearLabels);

// Declare Global Variables

var distance:Number;   // distance

var time:Number;       // time

// This is the displayVelocity function

// e:MouseEvent is the click event experienced by the button

// void indicates that the function does not return a value

function displayVelocity(e:MouseEvent):void

{

// declare the variables

var velocity:Number;      // velocity

getData();

velocity = distance / time;

lblOutput.text = "The velocity is: " + velocity.toFixed(1) + " km/h.";

}

// This is the getData function

// It gets the distance and time from the user

function getData()

{ // get data                                                           <--This part right here.

// This is the clearLabels function

// e:MouseEvent is the click event experienced by the textInput

// void indicates that the function does not return a value

function clearLabels(e:MouseEvent):void

{

     lblOutput.text = "";

}

here is the program I made, sorry its small, try to zoom in