Find .56 from 19.56

[varshavmane]

Hi All, I need to find the value after decimal in mathematical way... Ex: I have a number 19.56 and my formula gives me .56 Please help me... Thanks in advance...

[Expert Coming]

What language are you programming in?

The only way to speed up a Macintosh computer is at 9.8 m/sec/sec.

[zqueezy]

in mathematical way I would say .56 = 19.56 - floor(19.56) or in c++ float rest = 19.56 - int(19.56); sufficient?

[Giorgi Dalakishvili]

I think this should help you: http://en.wikipedia.org/wiki/Floor_function

[varshavmane]

Thanks for the help.I need a mathematical way I dont want to use programming language for this....

[CPallini]

By convention there is the [] operator, defined the following way

= the integer part of x

hence you can use

x-[x]

to extract the decimal part of x But, I know, it's just another way to say: 'take the decimal part of x' (BTW it is also a perfectly accetable function definition). :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.

[cmk]

For what it's worth, in C/C++ the function you want is modf. i.e. http://msdn2.microsoft.com/en-us/library/bk4c380c(VS.80).aspx[^]

...cmk Save the whales - collect the whole set

[Rilhas]

I think it is important for you to clarify what to do with negative numbers. What would you want to obtain with -19.56? -.56 or .44 (=-19.56-20.00)? The formula is usually simple for positive numbers because we all agree the integer part is the largest integer not greater than the given number, but for negative numbers we have to decide which reference to have (either 0 or -oo). Rilhas

[PIEBALDconsult]

x=((x*100)%100)/100

[Jeffrey Walton]

ExpertComing wrote:

The only way to speed up a Macintosh computer is at 9.8 m/sec/sec.

LOL...