I feel like this is fast/easy to solve, but I'm stuck AS 3 problem

[jamesont]

I thought I'd teach my grade 10 programming class Action Scripting 3.0. We've already gone through SmallBasic and they understand conditional logic, looping etc.. to give you a bit of background so I thought we'd tackle it in an OOP language.

I haven't tackled A.S. since back in 2.0 and I think maybe I'm missing something. I used this tutorial as a foundation and updated it to reflect AS3.0 for my course notes.

That said, when making their quiz, (a simple 2 question quiz that tallies the score at the end of the quiz) I keep getting a logic error. Everything runs smoothly using the controls, I'm getting the variables return properly to the Interpreter pane, but the logic evaluation at the end returns a glitch where it counts against my last clicked value and uses it twice to evaluate truth. Likely I'm missing something simple and it'll take somebody who knows Flash well about 3 seconds to ID my problem.

Thanks in advance.

FLA file if you want to browse it:

FLA file

SWF file if you want to view that:

SWF file

If you don't want to dload the files then here's AS code at the 3 locations (q1, q2, quizEnd)

Code Block 1 at frame 1:

// Initialize main timeline variables

// next, create variables to store user's answers:

var q1Answer;          // User's answer for question 1

var q2Answer;          // User's answer for question 2

//next, create a variable to track number of questions answered correctly:

var totalCorrect = 0;  // Counts number of correct answers

//finally, stop the movie at the first question:

stop();

choice1_btn.addEventListener(MouseEvent.CLICK, answer1);

function answer1(event_object:MouseEvent){

q1Answer = 1;

gotoAndStop("q2");

trace(q1Answer);

}

choice2_btn.addEventListener(MouseEvent.CLICK, answer2);

function answer2(event_object:MouseEvent){

q1Answer = 2;

gotoAndStop("q2");

trace(q1Answer);

}

choice3_btn.addEventListener(MouseEvent.CLICK, answer3);

function answer3(event_object:MouseEvent){

q1Answer = 3;

gotoAndStop("q2");

trace(q1Answer);

}

Code Block 2 at frame 10

choice1_btn.addEventListener(MouseEvent.CLICK, answer21);

function answer21(event_object:MouseEvent){

q2Answer = 1;

gotoAndStop("quizEnd");

trace(q2Answer);

}

choice2_btn.addEventListener(MouseEvent.CLICK,answer22);

function answer22(event_object:MouseEvent){

q2Answer = 2;

gotoAndStop("quizEnd");

trace(q2Answer);

}

choice3_btn.addEventListener(MouseEvent.CLICK,answer23);

function answer23(event_object:MouseEvent){

q2Answer = 3;

gotoAndStop("quizEnd");

trace(q2Answer);

}

Code Block 3 at frame 20

if (q1Answer ==  3) {

  totalCorrect = totalCorrect + 1;

  trace("Value for Q1 is 1 point");

  } else {

          trace("Wrong answer #1 " + q1Answer);

}

if (q2Answer == 3) {

          totalCorrect++; //simply adds 1 more to the previous value of totalCorrect//

          trace("Value for Q2 is 1 point");

} else {

              trace("Wrong answer #2 " + q2Answer);

}

//displays final score on interpreter

trace("Your total is "+totalCorrect+"/2 points");

//displays the answer on the stage

var txtFld:TextField = new TextField();

addChild(txtFld);

txtFld.text = ("Your total is" + totalCorrect);

txtFld.appendText ("/2 points");

//extra bits to un-comment once text output is understood

//txtFld.wordWrap = true;

//txtFld.textColor = 0xFF00FF

//txtFld.width=150

//txtFld.height = 60

[kglad]

looks ok.

except for the "/2 points", which looks flakey, which trace is giving an unexpected result?

[jamesont]

Let's say I click on button1 at frame 1 returning a value for q1Answer as 1, then button 3 at frame 10 returning a value for q2Answer as 3, I'll get both questions marked as right. Button 3 is the "right button" in each case so only q1Answer = 3 and q2Answer=3 should be correct.

Here's the trace output if I click as above:

1

3

Value for Q1 is 1 point

Value for Q2 is 1 point

Your total is 2/2 points

3

If I click on 1 and 2 say instead, here's the Interpreter result:

1

2

Wrong answer #1 2

Wrong answer #2 2

Your total is 0/2 points

2

Mystifying.

kglad wrote:

looks ok.

which trace is giving an unexpected result?

[kglad · Accepted solution]

oh i see the problem.

you're using the same button names for q1 and q2 and you're not removing any listeners.  you need to fix that.

[jamesont]

You sir, are a god. Thank you!

Frustrating, I guess the button names were global, I thought they'd be relegated to being relevant only to that frame, but clearly not.

Thanks again.

[kglad]

you're welcome.