Using only the decimal and leaving out the whole number

[helios]

Uh... I gave you the reference to modf(). How much more explanation do you need?

[beginner at programming]

Uh... I gave you the reference to modf(). How much more explanation do you need?

i really dont know i just dont have any clue how to use modf even with the reference because the reference is specified in only 1 way in only 1 example.


I dont get how to drop the whole number and how to keep the decimal
i thought this was easy... apparently it is hard. ( for me )
Edit: If this is too much to ask for then forget it: but maybe an example program would help.

[Disch]

the reference is specified in only 1 way in only 1 example.

How many examples do you need?

Here's another one, even though it's pretty much exactly the same example as on the modf page:

double original_number = 123.456;
double decimal;
double whole;

decimal = modf(original_number,&whole);

'decimal' and 'whole' are now set as you'd expect. (decimal = 0.456, whole = 123)

EDIT:

Edit: If this is too much to ask for then forget it: but maybe an example program would help.

The modf page has an example program.

[beginner at programming]

Sorry. I guess i was too lazy to look at the example.

[buffbill]

Ok-- would someone scratch my thread above?
Of course the heleos solution using fmod is the shortest and easiest to implement and understand.

[axxl]

another way (I think it's quick 'n dirty (I'm a beginner too)):

  float x = 8.0, y = 7.0, z;
  z = x/y;
  z -= int(z); 

or:

    float z1 = (x/y) - int(x/y);

I'm interested in feedback about this "hacks"

[Disch]

better to use modf.

integers and floating points are stored in two entirely different fashions, so switching between one and the other (and back) as you are doing is a whole process. It's best to avoid that if you can.