Is it possible to split a float in two int using the comma as divisor?

Projects Programming
1

Hi all, i have this question: is it possible to split a float in two int using the comma as divisor?
Thank you all.

2

If you want to convert a float to two ints, subtract the truncated int value from the float, then multiply the remaining fraction by 10000.

3

Do you mean that you want 12,675 to become 12 and 675?

float val = 12,675;
int whole = val;
int remainder = (val - whole) * 1000;
4

Mmm... sorry, is not very clear how for me.
I was searching something like this: split() / Reference / Processing.org

For exampe I've 1050,62. I split with the "," and I obtain 1050 and 62.
Are you talking about a mathematical way to do it instead than a command?

5

I see... yes it have to work, so simple and smart!
But, just for know, there is also a processing like function to do it (for example to make the same with a text).

6

But, just for know, there is also a processing like function to do it (for example to make the same with a text).

Splitting a string is completely different from dividing and truncating a float value.

If can be done, using strtok().

7

secondsky:
For exampe I've 1050,62. I split with the "," and I obtain 1050 and 62.

Is that a string "1050,62" or a floating-pint number?

For a floating-point number:

float myFloat = 1050.62;
int firstPart = myFloat;
myFloat -= firstpart;
int secondPart = myFloat * 100000;
while (secondPart > 0 && (secondPart % 10) == 0)
    secondPart /= 10;

This should leave you with 1050 in firstPart and 62 in secondPart.

8 
int secondPart = myFloat * 100000;

BZZZZZT

9

AWOL:

int secondPart = myFloat * 100000;

BZZZZZT

OK, OK. Make that:

int secondPart = myFloat * 1000;

or

long int secondPart = myFloat * 100000;

And if the value might be less than 0 be sure to use the absolute value.

10

proposed code might not work with leading zero's in the second part: check - 1050.0062 would result in 1050 and 62 or ...

So you should split the float in three longs if you want to reconstruct it..

  1. W : the whole part - before the .
  2. N : a numerator - for the fraction part
  3. D: a denominator - for the fraction part

F = W + N/D

alternative for D one could store E the exponent of power of 10

F = W + N * 10^E