Incrementing/decrementing entirely a float type number

Question

What I'm trying to do is to increment the entire float value, for example:

Incrementing

-0.09683964401

to:

1.09683964401

or:

1.09683964401

to:

2.09683964401

Decrementing

-0.09683964401

to:

-1.09683964401

or:

-1.09683964401

to:

-2.09683964401

I know I would need to use a loop, but how would I do it?

This is what I tried:

(float)myFloatValue++;

which doesn't do what I actually need.

@nicomp should I use it in a loop? How should I do a loop? Replying to your question: it doesn't increment the entire float value. — xF00lProgram, Apr 23 '16 at 12:54
You say "What I'm trying to do is to increment the entire float value," - but your examples show incrementing only the integer part; and leaving the absolute value of the floating part unchanged — M.M, Apr 23 '16 at 12:55
I don't know what that means. "It doesn't increment the entire float value"? What, precisely, does it do? What does the entire code snippet look like? — nicomp, Apr 23 '16 at 12:55
@M.M **that was an example. Didn't want to use the calculator to increment everything**... My question was how could I increment the **entire** float value, so other than the integer part, the absolute value goes incremented too. — xF00lProgram, Apr 23 '16 at 12:59
@xF00lProgram "incrementing the entire float value" on `-0.09683964401` gives `0.90316035599` — M.M, Apr 23 '16 at 13:02
@M.M ok, in this case the first (integer) part doesn't changes. How could I integrate this in C++? — xF00lProgram, Apr 23 '16 at 13:04
@xF00lProgram sorry I have no idea what you mean. Perhaps you could give some more examples. — M.M, Apr 23 '16 at 13:05

score 0 · Answer 1 · answered Apr 23 '16 at 13:05

The behaviour in your examples could be reproduced by:

void increment(float& f)
{
    if ( f > -1 && f < 0 )
        f = -f;
    ++f;
}

void decrement(float& f)
{
    if ( f > 0 && f < 1 )   // Presumably; you didn't show any examples in this range
        f = -f;
    --f;
}

score 0 · Answer 2 · answered Apr 23 '16 at 13:07

You don't need a loop to increment or decrement any number.Either use the ++ operator

myFloatValue++

or

myFloatValue = myFloatValue + 1

This will increment the entire number and not just the integer part.And if want to increment only the integer part then

myFloatValue = myFloatValue < 0 ? (-myFloatValue  + 1) : (myFloatValue +1);

Incrementing/decrementing entirely a float type number

Incrementing

Decrementing

2 Answers2