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

[pawelk15640242]

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

[kglad]

distance and time are undefined and the following should trigger an error (but even when you close that bracket it will do nothing).

// This is the getData function

// It gets the distance and time from the user

function getData()

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

p.s. it looks like distance and time should be defined in getData(). eg:

function getData():void{

distance=Number(distance_tf.text);

time=Number(time_tf.text);

}

[pawelk15640242]

I thought I defined them before in this part

// Declare Global Variables

var distance:Number;   // distance

var time:Number;       // time

But I added your work underneath "//get data" but I got an error. It did not recognize the "tf.text" It said I have to define that too.

[JoãoCésar · Accepted solution]

As kglad said, you should define the distance and time. For this, you have to get the text typed by the user. Like this:

function getData():void
{
     distance = Number(txtinDistance.text);
     time = Number(txtinTime.text);
}

Regards,

JC

[pawelk15640242]

I simply added that, and my program worked. Instead of just giving N/A, it calculated. But I don't understand how I didn't define it. I made distance and time a Global Variable outside the function.

[JoãoCésar]

Excellent!

It's because you declared the variables but they didn't have a value stored yet.

You could've written:

var distance:Number = 100;

var time:Number = 2;

But the value would always be the same everytime you click the button. That's why you need to get the values entered by the user.

[pawelk15640242]

Right. That makes sense. I was able to understand that. Thanks.

[JoãoCésar]

You're welcome!