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Private float value ios

I have a value, for example int value1 = 11

after dividing by 2 ( value1 / 2

) it returns 5. The real value in float is 5.5, can anyone help me return 6 in this case or other case ..? In general, I want to round up the value to the next one above.

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4 answers


If you always want to round and have a value float

, use ceilf

(from library <math.h>

).



If you want to round an integer division by n

, do (value + n-1) / n

. So, for division by 2, this becomes (value + 1) / 2

.

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there are ceil (<# (double) #>) or ceilf (<# (float) #>) functions that round the value up

Also, you must explicitly use float / double calculations to get 5.5, which can be rounded up.

ceilf(value1 / 2.0f);

or



ceilf(1.0f * value1 / 2);

If you don't, it can be presented in the following sequence:

ceilf(11/2) = 
1) 11/2 = result int = 5
2) ceilf(5)
3) 5 ->int implicitly cast to float -> 5.0f
4) result 5.0f
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Well, usually, you just add 1:

int half = (value1 + 1) / 2

So you will always round up. Should be the easiest way for integers.

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ceil(value1 / 2)

Rounds to nearest int

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