alice-teacher Problem with INT function??

[Deane Fistick]

Thanks Claude,

I think you're on the right "track". I will continue to suggest the "rearranged" formula for now.

Strangely, a simple version of the program that Don Slater sent me (made on his Mac) runs correctly on my Windows machine.

Deane

From: alice-teachers-bounces+deane.fistick=ecotoh.org at lists.andrew.cmu.edu [mailto:alice-teachers-bounces+deane.fistick=ecotoh.org at lists.andrew.cmu.edu] On Behalf Of "C. Guéganno"
Sent: Sunday, August 11, 2013 1:39 PM
To: Alice educators
Subject: Re: alice-teacher Problem with INT function??



 it could be  problem of type..
 if NumberEntered  is of type double or float (i.e. decimal number) ,
    NumberEntered == (int)NumberEntered   is always false
 (entering a whole number  does not modify its type)

 Your second test is good. By rearranging the equation, you modify the types :
    left side: (decimal number) - (whole number) -> the result is of  type 'decimal value'
    right side : 0 is automatically interpreted as 0.0 (due to the left side)

All the best
Claude Gueganno
http://www.st-joseph-lorient.org/



Le 11/08/2013 18:23, Deane Fistick a écrit :
Hi Don,

I recently downloaded Alice 2.3.5 preparing for the coming school year. I was pleased to see that the INT function (in advanced math) is now a number rather than a string.

However I had some trouble getting it to work properly. I was teaching the kids how to check to make sure the user had entered a whole number when asked.

If NumberEntered = Int(NumberEntered) should be true if a whole number is entered - but that doesn't seem to work.

I did figure out a "work around" by rearranging the equation.

If NumberEntered - Int(NumberEntered) = 0 seems to work OK.

Although we have a "work around", the first If statement is the most straight forward, logical approach, and I would like to use it if possible.

Do you know of any reason why the first If statement shouldn't work?

I've attached a copy of the relevant part of my lesson, which includes more detail and pictures that may help.

Thanks,
Deane Fistick
ECOT (Electronic Classroom Of Tomorrow)




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