Math blaster app

[jaqulain]

i had used this block coding for addition quiz ( to view  coding click on link)-->   (http://www.appinventor.org/content/ai2apps/intermediateApps/mathBlaster) now i used this coding for Subtraction quiz but problem arise when i click on answer button but answer is always "Incorrect".  

 Note: i used math blocks of subtraction for subtraction quiz. plz help to solve problem ?????????????

[Abraham Getzler]

Show us your relevant blocks and screen shots, as attachments,

using the POST REPLY button.

ABG

[Scott Ferguson]

Looking at your addition tutorial, I don't see why it would not work for subtraction as well.

Note that you can also insert an image into the text of your reply by using the icon on the toolbar that looks like a photo.

---

sf

[jaqulain]

[Ghica]

You get an incorrect result, because using subtraction you must set the global result to the first item in your list, not to 0.

Cheers, Ghica.

[jaqulain]

i agree with you Gica that i should not set globle resul to 0 ,bt what number should i set to globle result instead of zero??? so i m confused

[Ghica]

If you have a list with, for example, 6,3,4 I assume that you want the result to be 6-3-4=-1
Therefore, you should set the initial result to 6, the first element in the list, as I said, and iterate over the rest of the list starting at the second element.
Cheers, Ghica

[jaqulain]

thanx Ghica for your guidence, it will be more helpful for me if u send me source code of subtraction so that i may understand easily....waiting for ur humble reply.....

[Scott Ferguson]

You keep adding 3 numbers to the global numbers list each time the NextBtn button is clicked.

So you start with 3, then 6, then 9, etc.

At the start of the NextBtn.Clicked block you need to set numbers to empty list.

---

sf

[Ghica]

Please post your .aia, I will fix it then.
Cheers, Ghica.