CS13 Calculator Project #3

Starting with the 2-input form you created for Calculator Project #2, using "Visual Basic",
add a third input and the following buttons:

(Let a, b, and c represent the three inputs).

SUM3 ' Sum all three values (a+b+c)
MAX3 ' Compute the maximum of a, b, and c
EVEN ' Determine whether or not a is even (divisible by 2)
SUMRANGE ' Sum all integers from a to b
SUMEVEN ' Sum all even numbers from a to b
SUMMULT ' Sum all multiples of c from a to b
FACTOR ' Is "c" a factor of a?
PRIME ' Does a contain a prime number?
(i.e. Does it have any factors between 2 and a-1 ?)

Following ia a useful function for determining whether or not one number is a factor of another.


    Function isFactor( number as Integer, factor as Integer) as Boolean
        '''' Is c a factor of a ?
        '''' Return true if c divides evenly into a, with no remainder.
        Dim yesno as Boolean
        if (a mod c) = 0 then
            yesno=  true         ' Remainder is zero - it IS a factor.
        else
            yesno=  false
        end if
        return yesno
    End Function