New Math

[Rob Cozens]

>Second:  I have some funny math going on.  It's the same States Quiz.  I'm
>trying to have the stack keep a running track of the number of correct
>answers, the number of attempts, and then divide the former by the latter
>and multiply by 100 for an accuracy percentage.  For simple math, such as
>3 successes out of 4 tries, the correct percentage (75) is given.
>However, for other results, it's not:
>
>2/3 = 6667
>5/6 = 3333
>6/7 = 4286
>7/8 = 87.5
>8/9 = 8889
>10/11 = 9091
>
>Here's the script:
>
>[snip]


>Aside from the fact that there are probably vastly more elegant scripting
>solutions, can anyone help tell me what is going on?

Hi Judy,

Here's what I tried (on a card with fields "State", "Tries", "Score", 
& "Average"):

on mouseUp
   set the numberFormat to ".00"
   put (field "Tries")+1 into theTries
   put theTries into field "Tries"
   if field "State" = 7 then
     put (field "Score")+1 into theScore
     put theScore into field "Score"
   end if
   put (theScore/theTries)*100 into field "Average"
end mouseUp

Here's what I got in field "Average":

2/3 = 66.67
5/6 = 83.33
6/7 = 85.71
7/8 = 87.50
8/9 = 88.89
10/11 = 90.91

One thing I noticed:  After you put theScore into field "Score" you 
send mouseUp to field "Play".  Is it possible this changes the value 
of theScore?

Now to your aside:

You should be able to do what you want to do with one handler in the 
card script or a group script if your state images are grouped.  One 
way to do this would be to name each image [stateName].gif and give 
each image a stateNumber property (eg: set the stateNumber of image 
"Utah.gif" to 7).  Then you could script something like:

on mouseUp
   global theState, theScore, theMClick, theTries, theAverage
   get the stateNumber of the target
   if it is empty then exit mouseUp  -- logic to make sure the target 
is a state image.
   if theMClick = 0 then
     answer "Please click on the 'Play' button!"
     exit mouseUp
   end if
   add 1 to theTries
   if it = theState then
     answer "Correct.  This is the State of"&&(char 1 to -5 of the 
short name of the target)&"."
     add 1 to theScore
     put 0 into theMClick
     put empty into fld "Instructions"
     send mouseUp to btn "Play"
   else  answer "No, this is not correct.  Please try again."
   put theTries into fld "Tries"
   put theScore into field "Score"
   put (theScore/theTries)*100 into theAverage
   put theAverage into fld "Average"
end mouseUp

-- 

Rob Cozens
CCW, Serendipity Software Company
http://www.oenolog.com/who.htm

"And I, which was two fooles, do so grow three;
Who are a little wise, the best fooles bee."

from "The Triple Foole" by John Donne (1572-1631)