division

[Ben Finney]

On Mon, 23 Jun 2003 03:41:28 +0100, kpop wrote:
> thanks for the help, I think i will change all the numbers to floating
> points then do the eval
> and if the result is not a float that end with..0

Rather than using string processing (slow, difficult to understand,
prone to error), use modulus to find the remainder (fast, obvious,
built-in):

    remainder = ( result % 1.0 )
    if( remainder > 0.0 ):
        raise SomeExceptionYouCreatedForThePurpose

> i will inform the user they typed something wrong

I think your program design needs re-thinking.  If I typed "4 / 3" into
an arithmetic evaluator, and was told that was an error, I'd certainly
consider it a design bug in the program.

Can you explain more fully what it is you want to do?  Why do you
consider a fractional result to be an error?

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